Get coordinates figure matlab. How to get position coordinates of axes'.

Get coordinates figure matlab Hi what if I have a set of 60 points (n=60), where x and y are real and imaginary parts of a complex number Z. I'm trying to get the X,Y coordinates of pixels found at the end points of ellipses. I am looking for a way to find x-axis points for a particular y-point, for example in the attached figure i need to find x-axis points Hi! I have an image that I would like to get the coordinates from. Get the coordinates from the XData and YData properties of the Line object. [xi,yi] = getpts lets you choose points in the current figure using the mouse. The coordinates update when you do any of the following: Press the mouse button within the figure. For example I already have a script that will reposition and resize all my figures stacked in the middle of my screen, but I would like to access the main window and the script editor window as How to extract x,y,z coordinates from a contour?. Is there a way I can click on the graph and extract x and y data po The math is fairly simple if I can get the figure coordinates clicked by the mouse on a 3D plot. The getCursorInfo function returns the target and Matlab: Get coordinates of clicks in figure BUT keep button-callbacks. It outputs a cell array of character vectors named all_titles . t axes to get position w. How do I do that? I want to eventually calculate the euclidean distance of points using the function distance square root (x^2 +y^2). Learn more about data, excel, figure, cartesian . It shows how to convert from axes coordinates to image pixel coordinates. I want to get some specific values from a Matlab Figure. Learn more about picture coordinates, positions, psychtoolbox, screen, rectangle I'm running an eyetracking experiment. the following code in a relevant call back: app. I am working on a code to determine the area inside a shape using a matrix. Is there a function to do this automatically ? I would like to make computations on the cursor coordinates that the user drags in the plot (imshow). If I want to plot additional lines on this figure, or add text using Download and share free MATLAB code, including functions, models, apps, support packages and toolboxes. I'm using a for loop to do it but it doesn't assign the input to the variables, here The (2xN) ‘C’ array will have the (x,y) values of the contour lines. I need to get the coordinates of some points I choose and get them saved. lat and lon are 2-D arrays when used with the geoshow(lat,lon,Z) syntax, the geoshow(lat,lon,I) syntax, or The newPosition variable just makes sure the figure is first in your desired monitor before you maximize the window. the figure / the window containing the plot has a width of 1 length units). The subplot(m,n,p) divides the current figure into an m-by-n grid and creates axes in the position specified by p. ) described in the Matlab help, so there is a lot of usefulness in the knowing this command. Follow edited Sep 30, 2015 at 19:10. Here's the image; Beginning and ending x-coordinates, specified as a two-element vector of the form [x_begin x_end]. I have a plot on matlab with points on the plot. Learn more about signal processing, plot, data, data acquisition, extract, figure Dear All, I am looking for your kind help to my question. My plot consists of time (x) and velocity (y). Find the treasures in MATLAB Central and discover how the community can help you I'm looking for some way of turning a JPEG into a MATLAB figure (which I know how to do). Call the gca command to get the current axes within that figure. XData and hh. Hi guys I can get the position of the entire figure, or the axes easily, but I am interested in getting the position of the actual plot. ) that I have drawn on a plot? get the y coordinates by clicking on the plot in matlab. I am trying to create a scalar point map in a CSV file type. 6. Spatial Coordinates. Rectangular area to capture, specified as a four-element vector of the form [left bottom width height] in pixels. I am performing Roberts method for edge detection. Hello, So I've been using ginput to select points on a plot My plot consists of time(x) and velocity(y). To directly find the elements in X that satisfy the condition X<5, use X(X<5). This is strange. Specify the sizes of Learn more about matlab, cursor location, ginput MATLAB I am using ginput to select a location within a plot. How is it possible to get, directly from the Matlab command window, the position (i. Note that gcf and gcbf return figures created with the figure function only. Use normal button clicks to add points. Ideally, you could get the position of your MATLAB editor window and simply index N to be anything but that window so that your figure maximizes in 2-D vertices of the polygon, specified as a 2-column matrix. Learn more about guide, imagesc, coordinates Hi All, I may have a misunderstanding of how data habndling or axes work when using guide. Get coordinates from image (imagesc) in guide. I have no problem getting the x-coordinate indices, but I cannot get the y. Specify the tsunami locations using the Latitude and Longitude table variables. Is there a function that would allow me to access the current location of the cursor as I move it (before pressing the mouse) and display the c. I've only needed the coordinates inside the image itself. use a second axes that shares position with the first one, and where you position the text in coordinates relative to that second axes; lock the relative position of the axes relative to the figure, and use annotation() Perhaps provide an example pair of coordinates with what you expect to be the desired outcome. You can search for a place using a city's or town's name, as well as the name of special places, and the Get coordinates of edges - Image Processing. For example, here is a plot containing one line. I need to perform some operation with the image. YData are the x and y values of the data you're contouring, rather than the x,y position of the contour line). I'd probably first crop the image to the known region where the pattern lives. ) I have plotted some data. Sign in to answer this question. To plot a line between the points i use plot([x1,x2],[y1,y2]) That should give you the desired outcome. Digiize a curve in a figure to get the data coordinates. The first column of P contains the x-coordinates of the vertices, and the second column contains the y-coordinates. I want to open up a matlab figure which looks like this and be able to find the RGB values at specific X and Y coordinates that I enter for example x = -122. You can work out the coordinates to use by examining. e. Then I'd threshold the image to find the gray boxes. If the plot has multiple lines, h is returned as an array of Line objects. Any way to trigger a callback function while hovering over a point in Matlab? 4. content = getDataTips(__) - stores content of data tips to a cell array. Then pass the axes to the findobj function to search for all lines in the axes. h = findobj('-regexp',prop,expr) uses a regular expression to find objects with specific property values. In MATLAB Online öffnen. Finally, remember down the road that (generally speaking) you can 'get' nearly every property of an object (figure, axes, lines, labels, etc. 104k 22 22 gold badges 195 195 silver badges 201 201 bronze badges. For example, find(X<5) returns the linear indices to the elements in X that are less than 5. I want to find the x values that give me 0. MATLAB how to get mouse Call the gca command to get the current axes within that figure. Learn the 'set' command and you will a lot more power in controlling objects in Matlab. Notes: I know about the functions getpts/ginput but I would like to perform this without using them. Simply put, the image is not the data. 2-) It does not affect the output file if instead of "print" I Matlab: Get coordinates of clicks in figure BUT keep button-callbacks. If you need to access a specific figure, store the figure handle in your program code when you create the figure and Learn more about plot coordinates . Change Figure Size. The number of values can be 3, 5, 10, 50 or any N integer. Learn more about image processing, digital image processing, matlab . I then calculated the x-position of my 20s-marker in normalized coordinates as 20/(180*0. The left and bottom elements define the position of the lower left corner of the Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! Close. TextArea. The following code is used to generate the ellipse from my regionprops- Learn more about animate MATLAB I need to make this stick figure move left and right, and up and down. MATLAB ® numbers subplot positions by row. But whatever - I don't have the code like Amanda does and she said it works for her so that's what counts. I turned on data tips and clicked on those same 3 points to see their coordinates within the plot. I have a figure which is a 3D surface plot. get(0, 'MonitorPositions') However, since MATLAB uses "figures" for GUIs and dialog boxes as well as "plots", adjusting the default to be on the second monitor risks This Video will show you how to use ginput command to get the coordinates of any point on a plot in Matlab. I need to import 3D coordinates from excel to matlab and make points in matlab from those coordinates, I have three columns for each X, Y and Z coordinate. The user wanted to retrieve the coordinate (5,5) but instead got some kind of pixel coordinates like 341,257 (like the poster said). Use array indexing to access When the MATLAB figure is open, you can use the data cursor tool to help you traverse through the plot. Follow 4. To determine the current figure or the callback figure use gcf or gcbf, respectively. Thanks for help 0 Comments. It just depends on what you want to do, like just plot the box in the overlay, or plot it with handles asking the user to confirm the position, or use it to crop the image, or use it to mask the image inside or outside the box, or whatever. Create a default figure. time graph and instead just a 1-) The paper size change only affects the size of the output file (the one I'd get by print(gcf, '-dpdf', 'my-figure. ButtonDownFcn(1,1:2); %'5'; or some variation (none of which seem to work!). Specify the limit method as "tickaligned", "tight", or "padded". Select a Web Site. I want to use the getframe() option to make a snapchat of a part of my figure. Show -2 older comments Hide -2 older comments. g. Get mouse coordinates from a specific axis. No License. I am aware of the data cursor, but since I have a huge number of points, manual operation will be of no way. Extract x,y,z coordinates from figure. xyobj = findall(ax. %# and also have points outside the image Hi, I'd like to get the current cursor position in a figure, relative to the axes. I tried with get(gca, 'CurrentPoint'); but this only gives the position of the last clicked point, while I need lat and lon are vectors when used with the syntax geoshow(lat,lon). As I input C = get(0, 'PointerLocation') in command lines and put mouse on other posi How do I get the xy coordinates of all the 1's in a binary matrix? Hello, I am sorry I did not mean to frustrate you. 3 (8) 7K Downloads. To I am new to Matlab and I am not sure how to find the coordinates of the peaks or valleys of my graph. The axes is using normalized coordinates, which are relative to the figure. Your scatter plot has the coordinates of the shown axes (the white It would be helpful if MATLAB provided annotation available for data coordinates. in form of e. I would like know if I can use some other way to get values of my graph for y= 10^(-9) or like this. However, I noticed it doesn't actually select points from the voltage vs. fig files are basically simple MAT files with a . i need the x and y values of this data. 1. Learn more about ginput, cursor mode, gui opening the GUI the user will upload two images, and when pressed "match", my function is called and the match of both figures is shown. Matlab: Get coordinates of clicks in figure BUT keep button-callbacks. (It requires some coding to extract all of them effectively. In Matlab GUI, how get the figure handle of an external plot? 0. Something like my made-up 'plotParametric': I have attached an image, and I want to find the coordinates of the points marked by circles o. Value=s. figure,plot([0 1], [0 1]) If you want the original data, you're out of luck. Some functions use or return (row, column), like find(), and some functions like (x,y), like plot(). The documentation for this project is very good, and although I'm still trying to get used The principal problem in your case is that the points your plot and the line you draw with Insert have their coordinates relative to different origins and axes. rayryeng. For this I need to extract the X,Y and Z components for each point in the grid. Or clearvars if you want. Here's a quick example: t = 0 : 0. for the first point I want to display (15, 2) This code permits you to select a . Then you will see a change. That is: the inner rectangle. Ask Question Asked 13 years, 1 month ago. the coordinates) of an object (e. Finds the intersection point between two lines if it exists or else submits NaN. ButtonDownFcn a handle, or a property of s and how can I use it to put the results (button press coords) in a text box using, e. Like in sample pictures, I want to get values of A, B, C. Modified 13 years, 1 month ago. To select each point, move the cursor to your desired location and press a mouse button, lowercase letter, uppercase letter, number, or the space bar. Current object, returned as a child object of the figure. When you finish selecting points, getpts returns the coordinates of the selected points in xi and yi. This object is the front-most object in the view. Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! Add text to figure using mouse: xline: Vertical line with constant x-value: yline: Horizontal line with constant y-value: xregion: 1-D filled region between x-coordinates (Since R2023a) yregion: 1-D filled region between y-coordinates (Since R2023a) constantplane: Infinite plane in 3-D coordinates (Since R2024b) annotation: Create annotations Im plotting two points separately in a figure, using the data cursor to get the coordinates of the two points, and then plotting a straight line between them. The first column in each has the contour value as the first row and the number of (x,y) values defining the contour as the second row. This is what I've done so far, which works as long as I click on the empty part of the figure (if I click on the image, the callback is not triggered). Hi Everyone, I'm totally new to matlab so please bear with me. Having said this, I want to draw attention to our two main steps. Third coordinate of the data tip, specified as a scalar. I want to click --> get Values --> click --> get values --> click on the button --> finish. I'm just not seeing how your code turns the 341,257 into 5,5. MATLAB sets the XLimitMethod property How to get (x,y) coordinates of a categorical Learn more about bar MATLAB. I think the attached jpeg file clearly states my query. The variables you specify must contain numeric data of type single or double. The values are in units specified by the Units property. Hello, I'm doing homework through matlab and I'm trying to find certain points that will fit my answer through matlab plotting. Access to Matlab Main Window position coordinates. By default, MATLAB ® supports a subset of TeX markup. Now in R2015 the approach doesn't work (hh. Below is my user-selected points. Use array indexing to access each There are many geospatial data sets that contain data with coordinates in latitude and longitude in units of degrees. It shows two methods of obtaining the coordinates of a data point by clicking on it. Then I'd call imerode a little bit to make sure the gray boxes are separated. I noticed it doesn't actually select points from the voltage vs. If you want to get the distance between the edge of the figure and the axis plot area, you need to stop using normalized units and switch to pixels. However, the documentation says that getframe(__, rect), the rectangle coordinates are in pixels. Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! getDataTips() - prints content of all existing data tips in the current figure to the command window. if you need to find the intersection of the multiple line segments, MATLAB's Mapping Toolbox has function polyxpoly - that finds the Sorry for the late reply. The ginput() idea is explained in method #2. Choose a web site to get translated content where available and see local events and offers. I can use the "Data Cursor" to get the coordinatesbut its becoming tedious. how can I get the current mouse position using I have this image and need to find the coordinates of a pixel nonzero of the points marked in red in image. e. A fast two line intersection point finder based on the line parametric space. I'm a bit noob with matlab, that's why I'm asking for some help. This example illustrates how to import geographic data with coordinates in please find the attachment; in the figure, there are two data values. Once we are dealing in the same units, we transform the position of the label w. Skip to content. The best I have so far is this: % code function Skip to content Find the treasures in MATLAB Central and For example, open a new figure window at the MATLAB prompt. The following statement assigns this callback function. Learn more about mouse, coordinates I'm trying to track the position of the mouse as it scrolls across the figure, so I need the coordinates relative to that figure's axes. And then be able click on the figure and have the x and y values of where I clicked go into the code as variables, so I can take them through some function. Viewed 5k times 4 . The structure array "cursor_info" contains all information regarding selection sequence, x- and y-coordinates of the points selected. I want to place a textbox with some text init which belongs to the entire figure. After extracting the x,y and z do you know how to plot it like a 3D plot which shows a conical projection corresponding to the height present in the geotiffimage (for example height of a tree in the image). 01264. getDataTips(h) - specify an array of figure or axis handles. 5 to the year for the b release. 2. Learn more about ginput, matlab, plot, distance MATLAB. r. So if n>1 the function waits for n clicks to be done before returning the x/y Data. First, we match the units for the position of the label with the units for the annotation function. If you type edit ginput and scroll to line 238-ish, you'll see % Adding this to enable automatic updating of currentpoint on the figure set(fig,'WindowButtonMotionFcn',@(o,e) dummy()); In other words, ginput sets a WindowButtonMotionFcn in the figure. Find more on Get Started with MATLAB in Help Center and File Exchange. In the geotiff image is the height information as well. 01264 and I don’t know how to do that. In a spatial coordinate system, locations in an image are positions on a continuous plane. I would like to know if there is a way to get the coordinates of the pink lines in the MATLAB plot, so that as I move the mouse cursor in the matlab plot, I get information Hello. Children, '-Property', 'xData') xydata = get I used those 3 coordinates to add 3 red X's. MatlabVersion=version For example, if the figure contains a line plot, you might want to get the X and Y data for the line. pos=get(fig, 'Position'); where x, y, w, and h are fixed x and y coordinates and w and h are fixed width and height. However, to ensure that I will get the same snapshot on another computer, how can I give rect in normalized coordinates? [xi,yi] = getpts lets you choose points in the current figure using the mouse. For Cartesian axes, the third coordinate is the z-axis position using the same units as your data. If the coordinates were inaccurate, they would not have matched the 3 points I clicked on. Consider the following code. So just watch out for that constantly as you use MATLAB. It seems the general strategy is to convert the image into a binary image and then extract white or black regions. If you want to store the data points rather than display them, you can use a modified update function I am trying to find out the coordinates of the edge from this figure but it doesn't work for me. However what I get from textBox is not very helpful! some negative numbers!! can anyone provide me some tips Get coordinates of points from an image. For example, the first arrow originates from the point X(1) and Y(1), extends You may want to take a look at Paul Mennen's plt package on the File Exchange. time graph and instead Instead, users can directly read and analyze the *. net is an online geographic tool that can be used to lookup latitude and longitude of a place, and get its coordinates on map. User interaction can change the current figure. mat) I am currently using the function Geoplot function to plot the coordinates of my robot live using the onboard GPS, I currently assign a target coordinate by manually writing Get the coordinates from the XData and YData properties of the Line object. pdf')) and not the output figure you see on the screen after running the code. It's in pixels. If latvar and lonvar both specify Cursor coordinates in MATLAB figure. You can get the 'Position' property for all the controls on the figure window, and then dynamically place things. Plot data tips are a great visualization aid for Matlab plots. 3516220639968. The displayed tooltip text is even for i=15:55 for j=2:9 plot (i,j) end end for the above program, I want to display the coordinate of the point near the point in the figure. I want a proper boundary around these bins because I want to display that boundary in another figure. t = [0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180]; y = [0 5 9 19 25 32 46 65 79 90 100 While MATLAB displays arrays according to their defined sizes and shapes, they are actually stored in memory as a single column of elements. Search Answers Answers. The biggest difference between that and using a ButtonDownFcn as a callback is that ginput() is an active command that has to be issued by a running function which would wait for the coordinates and then proceed, whereas callback functions are passive, with no function running until the user The matlab doc gives a way to manually Export Cursor Data to Workspace. File Exchange. All images of plotted data are simplified representations of the underlying data, intended for visualization-- not as a store of data. How would I do this in MATLAB? matlab; cursor; coordinates; Share. f = figure; Get the location, width, and height of the figure. Follow 21 views (last 30 days) Show older comments. Create a geographic bubble chart from the table by using the geobubble function. Objects with property values satisfying the regular expression are returned. How to get position coordinates of axes' Learn more about axis, grid, container, position, xtick, ytick, tiledlayout, subplot I would like to know the intersection points of the X and Y major grid lines for an axis, with respect to the parent figure. patch connects the vertices in the order that you specify them. While the following array is displayed as Is there a MATLAB command/s for getting the coordinates of manually selected point in an image (figure)? Till now I have doing this using the figure toolbar but i will need to use it in an m file. Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! How can I get the coordinates at a specific point? I want to get the X coordinate of the points with Y = 18. Matlab Figure Location in Your Screen. To plot a set of coordinates connected by line segments, If Y contains complex numbers, MATLAB If you specify "auto" and the axes plot box is invisible, the marker fill color is the color Latlong. If you delete a UI figure, MATLAB can reuse its number Icropped = imcrop(I,rect) crops the image I according to the position and dimensions specified in the crop rectangle rect. 4. % Close all imtool figures if you have the Image Processing Toolbox. Rosie on 8 Aug 2012. ×. How can I get CurrentPoint to display the coordinates within a figures axes rather than the coordinates of the whole figure itself. For example, can I create a boundary manually with a mouse on the Matlab image and display the cropped Here is the link to find the intersection point of two line segments/lines. Use TeX markup to add superscripts and subscripts, modify the font type and color, and include special characters in the text. 56). If the UI figure is scrollable, the coordinates are measured from the lower-left corner of the scrollable area. Is this possible using ButtonDownFcn? (see the following code) function testClicks img = ones(300); In the example, the figure isn't using normalized coordinates. Sample Code. The vector contains the (x, y) coordinates of the mouse pointer, measured from the lower-left corner of the UI figure. 078519830603 y = 59. The problem I have run into is extracting the individual coordinate points of a circle and even storing that data in a matrix. 01 : This Video will show you how to use ginput command to get the coordinates of any point on a plot in Matlab. After looking online, I tried using findpeaks() which did give me the y-values of the local maxima of my function ((e^(−at))*cos(2πft), where t is time and a and f are constants). Examples. I wish to obtain the x and y coordinates of desired points on my graph. If you want to place the x-axis somewhere in the middle of the picture, this is not possible in my x,y coordinates of edge lines in image ??. 7750) (first normalizing to the length of the polarplot(theta,rho) plots a line in polar coordinates, with theta indicating the angle in radians and rho indicating the radius value for each point. an arrow, a rectangle or sim. Find the treasures in MATLAB Central and discover how the community I want to find the x and y coordinates of the cursor in a MATLAB figure in real time. t figure. Store coordinates of a clicked data point from the figure window. Since the axes position is being fixed, it shouldn't change WRT the figure, regardless of the presence or In old matlab versions, I could extract x and y points along a contour line as shown below. Now, we set the 'WindowButtonMotionFcn' property to point to the callback function which will execute each time the mouse moves on the figure. Identify five coordinates in a set of axes using ginput. Learn more about datacursor, 2016, gui, axes, coordinates Hi, I work with a GUI includes axes ( matlab2016a ), I already activated the datacursor in gui side (from toolbar), I can see coordinates when I click to graph, But I want to get coordi In the following code segment I am trying to get the exact position of the text bounding box with respect to the figure pixel coordinates( row and column) to eventually be able to crop off that part of figure ( from array img ). If one does not exist, MATLAB ® creates one using figure and moves it to the specified location. Is there a general straightforward way to do this or an alternative to get the coordinates? quiver(X,Y,U,V) plots arrows with directional components U and V at the Cartesian coordinates specified by X and Y. I would like to find the x,y coordinates of these points. You can represent the coordinates The function below get the current position of mouse on anywhere of the desktop even outside matlab. MATLAB sets the CurrentObject property to the last object clicked in the figure. You can get the X and Y data using the XData and YData properties of the "Line" object. Find the coordinates of a point chosen on a plot. Hot Network Questions Is there a printer for post it notes? What is the meaning behind stress distribution in returns the color values of the pixel at row 2, column 15 of the multi-channel image RGB. Learn more about extract x, y, z coordinates from a contour, contour . We will create this callback function in a bit, but for now we will call it 'mouseMove'. My guess is that impixelinfo uses this function as well, so it gets disabled as soon as ginput is called. Note that for 3-D figures, the selection sequence value is replaced by the z-coordinate value for the points selected. They enable users to interactively click on a plot location and see a tool-tip that contains the clicked location’s coordinates. You can also select a web site from the following list Yes, exactly. Its a 2D image. I display an image using the Screen function from psychtoolbox and I want to know the coordinates of some of the items displayed in the picture. One of the data tips is shows below. get the coordinate of a pixel by clicking on it in matlab. This function returns normalized coordinates in plot, semilogx, semilogy and loglog plots. 7750, corresponds to the default width of the plot within the figure in normalized coordinates (i. A good way to visualize this concept is with a matrix. Learn more about plot location that allows me to have my plots consistently appear on the right side of my screen without manually specifying their coordinates? I recall having achieved this before, possibly through cascade or aligning them vertically, but I can't seem to remember the exact method. Learn more about main, window, main window, position, reposition, command window, script editor . I need a function which gives me the coordinates of a click in my figure window AND the mousebutton which was clicked (left, middle, right or KEY pressed), but I still want to use How do i select a point on matlab UIaxes and Learn more about app designer, uiaxes, brush, brush tool, rbbox, appdesigner, uifigure, select data I created the axes by drag and drop the axes on the figure. Search File Exchange File Exchange. The inputs must be vectors of equal length or movegui(location) moves the current figure (gcf) or the callback figure (gcbf) to the specified location. You can see 2 on the figure below. An example picture is at this location, with the source code available for that plot as one of the 'demo' files. The first subplot is the first column of I would like to create a function in Matlab that, given an image, will allow one to select a pixel by clicking on it in the image and return the coordinates of the pixel. To find array elements that meet a condition, use find in conjunction with a relational expression. How can I do this? Skip to content. The explanation in the image() documentation is much better for what those values represent: please be sure to read the documentation as it is not quite what you would expect. The plot in figure(2) %get the Matlab version, add 0. Updated 16 May 2006. 324 (R2008a)) (you can retrieve version number with the version command). But my aim is to get the coordinates of the edges after applying Roberts method or any other method. % Get x,y coordinates [x, y] = ginput(1); % x = column, not row. This includes an auxillary function Pquiv (documented here) that allows the plotting of vectors. Doing this fix for position works for me, if there is only one set of axes in the figure but not for multiple axes. I'm not entirely certain myself (still quite new to matlab). Avoid function calls like X(find(X<5)), which unnecessarily use find on a logical matrix. h = findobj(gca, 'Type', 'line'); 3. I have a written a program which utimately plots a graph for me. I am trying to get the x value that corresponds to half ymax and I don’t know how to do that in Matlab. So far I have only used polygons, but I want to move to circles. . Based on your location, we recommend that you select: . P must have at least 3 rows. % Get coordinates of all data points in the axes. Once you know the top, bottom, left, and right columns from one image, it's easy to apply it to any other image. This is incredibly useful in my work. By default, if you specify the xlim(limitmethod) specifies the limit method MATLAB ® uses for automatic limit selection. . The size of the image, the width of the lines, and the degree of destructive compression used all create ambiguity that influences the precision I do wish this was an easier/more elegant change to the DataTip tool, since it would also be useful to use a standard plot command but with a third parameter variable that does not get plotted but does show up in the tooltip; useful for parametric equations. fig file, and processes it. 6. Regardless of variable names, the axis label on the plot is always Longitude. Hello, I am using bar(a,b) to plot a bar graph, with the x-axis containg categorical data (a is a categorical array), and the y-axis containg numerical data (b is a vector of numerical values). g A=(430,0. My idea was to use a Pushbutton which sets the ginput into an eternal loop, which can be Because the ginput points are in respect to the axes of the plot and the normalized points (used with the "annotation" command) are in respect to the whole figure, I can't figure out how to convert from plot coordinates to normalized so that I can use the annotation function. fig file by loading it into Matlab memory using the load () function, since *. It is typically the last figure created or the last figure clicked with the mouse. Use normal Get the coordinates from the XData and YData properties of the Line object. fig (rather than . I don't want any ellipse or rectangle around it. Follow 20 views (last 30 days) Show older comments. collapse all. I have this plot [Full Resolution]I need to make a straight vertical line at a point on x axis that the user enters and show the coordinates of the intersection of that vertical line with my plot. It should be an animation that shows the stick figure sliding along the x axis, likely using linspace for a time vector. Together the x and y input arguments determine the endpoints of the line, arrow, double arrow, or text arrow annotation. I could find the half ymax but I couldn’t not determine the x values You can use image() or imshow(), passing them XData and YData options for the coordinates. Share; Open in MATLAB Online Download You could also consider using ginput(5) to get up to 5 coordinates. So use yourImage(y,x), not Finally, on the left side: Is s. I need to get the cursor position after a click on the image to obtain the corresponding pixel coordinates. Say my half ymax is 0. These are actually 35 bins in the image. clear; % Erase all existing variables. Locations are described in terms of Here is a MATLAB function that plots a circle with radius 'r' and locates the center at the coordinates 'x' and 'y': In all the years I've used MATLAB I've never had to mouse around outside an axes and get the (x,y) coordinates. Pseudoname67747 on 24 Dec 2020. Can I know the point number (the 'n'th point) beside the coordinates or do I have to do it manually? Goal: To perform several clicks in one figure, containing an image displayed with imshow and save the coordinates of the "clicked" point(s), to be used in further operations. If you have any other quesitons, feel free to comment here (or in that link). It does in my version of matlab (7. I have a figure with several subplots in it. A shift-, right-, or double-click adds a final point and ends the selection. It's inconsistent to have provided text(X,Y,str) using X and Y in data coordinates and not annotation using data coordintes. It outputs a cell array named all_XData in which there is one celll array entry for each axes, that contains an entry for each line inside the axes, that is See this answer. If no figure exists with that property value, MATLAB ® creates a new figure and sets its Number property to n. MATLAB Answers. How to get the mouse click position on Matlab figure axes? 1. How can this be done in How can i convert the axis coordinates into pixel coordinates? I have a set of data which include the negative and floating values, i need to put all of the data into the image. Learn more about image processing, edge, coordinate system, matlab Even if you do not have a data button, you can activate the data cursor mode via the command datacursormode. The third element in the vector, 0. patch(X,Y,C) creates one or more patches of colored polygons by specifying X and Y as the coordinates for each vertex. hu on 2 Oct 2014. Improve this question. 1; Y = 33; Y = 70 Those points need to lie on the function that I plot. 0. I have obtained the following image (which is a binary). I used this function to plot. The 3rd one is covered up by the data tip. How can I continuously get the mouse coordinates?. It's gone. Below is a sample of the GUI. If I recover the projection matrix with T = view;, I think I should be able to back out the transformation by T if I hold z=0. Ideally, one would be able to click on several pixels in the image in succession, and the function would store all the respective coordinates in a matrix. Getting clicked point coordinates in 3D figure Matlab. The cropped image includes all pixels in the input image that are I'm trying to get a number of x,y coordinates (which I can vary, say 200 coordinates to start with) starting at the middle bottom of the plate and then going anti-clockwise around the plate. This is especially useful if you plot the image using custom XData/YData locations other than the default 1:width and I want to get several point 2d coordinates from the user and store the x and y coordinates in separate arrays. However, whenever I try to use the text command to place the text, it places it relative to the current subplot but not to the overall figure. Sign in to comment. taqoy zpaw kxvchz vxufep txrjnj mnk tdx lvljuq ouyn qhsxlye