# matlab 2d plot with colors from 3rd variable

Today I wish to show how we can achieve similar effects with plot markers. For some reason on Matlab 2014b the area alpha doesn’t seem to work. Thanks again. … It seems that if you set LineStyle, Marker, MarkerSize, or any items of that nature using the line handle before using hLine.MarkerHandle, then MarkerHandle becomes inaccessible. For example, if I set x = [1:10] and y = [1:10], and I plot(x,y,’o’), is it possible to change the circles to triangles from x(2:4)? hMarkers = hLine.MarkerHandle; % a matlab.graphics.primitive.world.Marker object RGB Triplet Hexadecimal Color Code Appearance [0 0.4470 0.7410] '#0072BD' [0.8500 0.3250 0.0980] '#D95319' [0.9290 0.6940 0.1250] '#EDB120' [0.4940 0.1840 0.5560] '#7E2F8E' [0.4660 0.6740 0.1880] '#77AC30' [0.3010 0.7450 0.9330] '#4DBEEE' [0.6350 … X,Y, and Z. X & Y are coordinates and Z is a value. Open Live Script. SupportsAlignVertexCenters: 0 I’d love to set these to a vector. y: Array of values to use for the y-axis positions in the plot. Then export_fig works its magic and everything looks great (even in pdf!). A plot can present the data in continuous, discrete, surface or volume form. Entering Edit Plot mode (the pointer icon on the toolbar) resets the ColorBinding and ColorData back to ‘object’ and the original color. I have a nitpicky question: when I change any hidden property of my figures I have to manually select the line of code and execute it by itself (sometimes I have to repeat this twice before it works). thank you very much for these very valuable tips! xData = normrnd(1, 0.2, 1000, 1); 128 128 128 255. >> hMarkers.EdgeColorData = [1,1,1,0.2]; Thanks for this awesome post. 140400 70.7850 1 140401 70.7923 2 140402 70.7993 3 140403 70.8067 4 140404 70.8139 5 140405 70.8212 3 Where the first column corresponds to time (one second intervals between data … hLine.MarkerFaceColor = [0.5,0.5,0.5]; Size: 6 LineWidth: 0.5 Thank you very much!! Do you have any suggestion for this situation? Thanks a lot for the trouble shooting. hMarkers.get % hence this does nothing hMarkers.FaceColorType = 'truecoloralpha'; shading interp colormap colorcube. cEdge = uint8(255*[0 0 0 0.3])'; (sorry about directly emailing – I missed your warnings) Mesh Plot. plot-lines with transparency and color gradient, Plot line transparency and color gradient, http://glowingpython.blogspot.co.at/2011/11/how-to-make-bubble-charts-with.html, https://undocumentedmatlab.com/blog/hg2-update#testing, http://stackoverflow.com/a/35070679/233829, https://undocumentedmatlab.com/blog/bar-plot-customizations, https://undocumentedmatlab.com/blog/customizing-histogram-plots, https://www.mathworks.com/matlabcentral/fileexchange/65194-peterrochford-markertransparency, https://undocumentedmatlab.com/blog/solving-a-matlab-hang-problem, Speeding-up builtin Matlab functions â part 3, Matlab toolstrip â part 9 (popup figures), Matlab toolstrip â part 7 (selection controls), Matlab toolstrip â part 6 (complex controls), Matlab toolstrip â part 4 (control customization), Reverting axes controls in figure toolbar, Matlab toolstrip â part 3 (basic customization), Matlab toolstrip â part 2 (ToolGroup App), Medium risk of breaking in future versions, Matthias Brenneis (101 days 20 hours ago). %This cannot show the current value of the markers. barColor = barColor'; Thanks for any help. This post has been really useful to me. 'LineWidth' , 0.25 ); . One more question: in MATLAB, I frequently need to generate a 2D scatter plot with: (1) use individual marker transparencies to encode a 3rd variable (e.g. Would the optimal solution be to create a function myLegend that would design the legend from scratch ? I am trying to plot with variable x with respect to another y and add a colormap based on the values of another variable z So the plot should be similar … many thanks In order to customize the legend itself, we need to dig into the legend object’s hierarchy. . 'MarkerFaceColor', [0 114 189]/255, ... Please see our. add a … This tutorial is Automatically plot with different color lines. Thanks Yair, Version: '1.1.0' As far as I can tell, changing the EdgeColorBinding (or FaceColorBinding) from ‘object’ to ‘interpolated’ or ‘discrete’ is problematic. hLine=plot(x,y,'o-'); The default standard function for 2D graph plotting is plot() function. Learn more about 4d, 3 variables, function, color representing, color, surface, color surface MATLAB Learn more about plot, 2d, third variable FaceHandle = get(fbarHandle.Face); I don't know however how i can plot the 3rd variable… (1) use individual marker transparencies to encode a 3rd variable (e.g. h(2).Face.ColorData(4) = 90; % =90/255=35% opaque =65% transparent. drawnow; One more question: in MATLAB, I frequently need to generate a 2D scatter plot with: Array contains incorrect data values. So you can use 1/255[255,0,0] to get the color of red to use as a color in MATLAB. 3D. My z-variable is also a 1xn vector. To make life easier, all files you save and … The comment of Arnold there is weird though. But then I'm supposed to color (from red to blue) each point according to a 3rd variable, which is a derivative of a couple other variables (getting convoluted yet?). MATLAB plots play an essential role in the field of mathematics, science, engineering, technology, and finance for statistics and data analysis. Thanks. I have corresponding Z values for X and Y coordinates . Yup, that works. set(threednumeric3,'ZDataSource','z_new3'); When I run the area command within a loop for plotting multiple sets of data into one plot it sometimes happens that the x-axis is resized to fit the data. You can use the ColorSpecs option to assign the colors to your third variable values in any order that you want, but unfortunately you are limited to the single-character color specifications that MATLAB … h(2).Face.ColorData(4) = 90; % =90/255=35% opaque =65% transparent SupportsGraphicsSmoothing: 0 It's also possible to visualize trivariate data with 3D scatter plots, or 2D scatter plots with a third variable encoded with, for example color. Any idea what’s going wrong? Cheers. Invalid or deleted object. One possibility is essentially a 3D animation (time being the fourth variable). I pasted your code into the command line, it works perfectly. On the top, you will see a bar with your current folder. ok, shame on me Yair, obviously it wasn’t the plot handle, might have been too late. For example: line(1:10, 1:10, 'LineStyle','-'); % original line with no markers The velocity should be indicated by the color of … I am facing problems exporting such figures as a pdf/svg to modify it using illustrator, especially when I have multiple subplots! EdgeColorData: [4x1 uint8] y=10*x; y . Specify the colors for a surface plot by including a fourth matrix input, CO.The surface plot uses Z for height and CO for color. Parent: [1x1 Line] . MATLAB Version: 9.0.0.341360 (R2016a) line([1,5:9], [1,5:9], 'LineStyle','none', 'marker','o', 'MarkerFaceColor','r'); % red circle markers Read the post text carefully and try the code snippets one by one. Unfortunately, the same happens even when hitting ‘Edit’ -> ‘Copy Figure’ or trying to export it. 200 190 180 170 160 150 140 130 120 110 * https://undocumentedmatlab.com/blog/customizing-histogram-plots, I tried using hBarChart.Face to change the colors of the bars, but it did not work. With the help of MATLAB (Matrix Laboratory), you'll be able to create stunning 3-D visuals with the data you provide. No transparency. A colormap is an m-by-3 matrix of real numbers between 0.0 and 1.0. an example of what I’m talking about can be found here: I am sure there has to be some way to do it, but I don't know how. number of people). hMarkers.FaceColorType = 'truecoloralpha'; I could have done so by passing 3rd variable to the color palette, but this would disrupt the relationship information among them. Assuming you used the builtin area function to generate the plot, you can set the FaceAlpha property of the area-plot’s children. Syntax: stairs(x,y) stairs(x,y,'colourmarkerlinspec') MATLAB Code: Here, I am writing the MATLAB code of stairs plot with the black (k) color … @DaV – I suspect that you have some extra code between the line where you plot() the data and the line where you extract/update the hMarkers and in the meantime either the line or the markers were deleted. Here are the full code lines that I used: CMtrans=uint8(255*(sum(hint.mat_norm(markersIn,:),1)./max(sum(hint.mat_norm(markersIn,:),1)))); For example, subplot and color/symbol selection: In [7]: subplot(1,2,1) plot(x, y, 'r--') subplot(1,2,2) plot(y, x, 'g*-'); The good thing about the pylab MATLAB-style API is that it is easy to get started with if you are familiar with MATLAB, and it has a minumum of I want to change size of Brushing marker. Adding a pause in front of setting the alpha value makes it reliable again. barColor(n,4) = (6-n)*0.15; % each bar will have a different alpha I was just trying this on a plot and get: h = plot(1:1:5, 'bo'); Hope this will help others as well. Color value must be a 3 element numeric vector, % a matlab.graphics.primitive.world.Marker object, % Otherwise pl.MarkerHandle gives me GraphicsPlaceholder objects. The mesh function creates a wireframe mesh. newcolordata(:,1) = [255;0;0;255]; % Turn the first marker red I did some further tests and I think I found at least one problem. for n = 1:5 I am getting a warning message after running the following command, hMarkers.FaceColorData=CMdata; addlistener(ha,'MarkedClean',... Renderer: 'GDI Generic' ha = plot(xData, yData, 'ko'); One more question: in MATLAB, I frequently need to generate a 2D scatter plot with: (1) use individual marker transparencies to encode a 3rd variable (e.g. However, the color input has to be a matrix. *cos(5*t); p = plot3(xt,yt,t); Change the line width to 3. p.LineWidth = 3; Specify Target Axes. (2) use individual marker sizes to encode a 4th variable (e.g. Is it possible to make the area plots transparent? I found that MATLAB’s scatter command does pretty much exactly what I wanted by setting the (mildly undocumented?) I’m still finding my way around MATLAB, and unfortunately I’m stuck – was wondering if I can access the hidden MarkerHandle in Matlab 2013a? 0 Comments. Any idea why that is? opengl('info') Thank you so much for this page, it is fantastic! I copy/paste your sample and run it. Sweet. Hello, hMarkers = L2.MarkerHandle; @Yair – Ah, I’ve figured out my problem. I created events listeners for markers in both plot and legends. he_mh = he.MarkerHandle; Matlab can quite easily plot figures in 3D, so a 4D plot is a straightforward extension. >> hMarkers = hLine.MarkerHandle; Related: https://undocumentedmatlab.com/blog/solving-a-matlab-hang-problem, Dear Yair, any hint on how this works with r2018b and beyond? As far as I tested, the above is not true for R2016b. @Lukas – Matlab automatically removes transparency when you modify the axes (e.g., by rotation). When I try to export the figure, the transparency of the markers is lost, but the transparency of other objects is kept (for example, patches). It seems like there is no MarkerHandle object created when using plot3. MaxTextureSize: 1024 The official color for Loyola Green is given as RGB:0-104-87, and Loyola Gray is given as RGB:200-200-200 (found on Loyola's Logos/University Signature page. Learn more about color coded, imagesc, plotting, custom color grid, heatmap hMarkers.FaceColorData = uint8(255*[1;0;0;0.3]); % Alpha=0.3 => 70% transparent red - restored after the legend call You will then see the transparent markers nicely. age of people). I’m would like to get a better view of many points in a scatter3 plot, but unfortunately the transparency is lost once I rotate the plot. This example explores some of the ways to visualize high-dimensional data in MATLAB®, using Statistics and Machine Learning … The surf function is used to create a 3-D surface plot. It’s a pretty awful hack job to achieve what I feel should be basic functionality but here we go: % generate data FaceColorBinding: 'object' hMarkers = hLine.MarkerHandle; Plot with color variation from third variable. Yes of course. hm.FaceColorData = FaceColor; Learn more about plot between a matrix, a vector and another matrix Thanks for writing this post. drawnow; % Otherwise pl.MarkerHandle gives me GraphicsPlaceholder objects CMdata=uint8([repmat(mCol'*255,1,length(CMtrans)); CMtrans]); Without the pause/drawnow, the graphics queue might reset the transparency after you have set it, depending on internal timings over which we have no control. I’m using 2014b and I’ve tried exporting to png and pdf using both the painter and the OpenGL renderers with similar results. Cool! Operating System: Microsoft Windows 7 Home Premium Version 6.1 (Build 7601: Service Pack 1) 25 1 1 silver badge 7 7 bronze badges. and retaining the transparency. Learn more about scatter, 2d plot, color 'BarWidth' , 0.8 , ... hMarkers.FaceColorData = uint8(255*[1;0;0;0.3]); The dots are still the same color. I'm to make a normal 2D scatter plot of the data with respect to 2 of the variables given, easy enough. hmarkers.EdgeColorBinding = 'discrete'; This will generate a simple line with the first point red. It’s the same as 2-D plot with addition of 3rd vector (array). Style: 'circle' Using MATLAB for this purpose allows you to have complete control over the customization of your graph. Do you have any idea or suggestion? I have nothing new except or using different dataset (the Matlab version is the same 2016a). 2d plot third variable. I've succeeded in writing a file that plots the points where measurements were done on the already existing map. Looks really neat. 4. Last week I explained how to customize plot-lines with transparency and color gradient. % keep transparent set([h.Face], 'ColorType', 'truecoloralpha') 0 10 20 30 40 50 40 30 20 10 But when I try to print, Matlab2014b clears everything. * https://undocumentedmatlab.com/blog/bar-plot-customizations https://de.mathworks.com/matlabcentral/answers/711563-plot-with-color-variation-from-third-variable#answer_593428, https://de.mathworks.com/matlabcentral/answers/711563-plot-with-color-variation-from-third-variable#comment_1251453. What is the proper way to manage this? he_mh.FaceColorType = 'truecoloralpha'; Do you have any further details / documentation about ‘MarkerHandle’? For example, I am wondering about how to use the xxBinding properties; how exactly do ‘object’, ‘interpolated’, ‘discrete’ and ‘none’ work? 98 1 1 gold badge 2 2 silver badges 8 8 bronze badges. Next time please be more considerate of others. As the error message indicates, hLine in your code is a handle to the axes, not to the line. Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots. Thanks a lot for the very useful hack. Call the tiledlayout function to create a 2-by-1 tiled chart layout. z=1 ... %You can choose other values and see the difference surfl(z); % surface plot with color-based lighting. Warning: Error creating or updating Marker Hey Guys, I've been trying to make a map which has indicators for the velocity that has been measured. I have the following code that worked for me in the past. Stairs Plot. oldcolordata = hmarkers.EdgeColorData; – there is no longer an option no known workaround for this purpose allows you to complete! Drawnow call after your plot ( ), you can use those colors in MATLAB Central and how. Page, it works perfectly 2D scatter plot using the stat_contour aesthetic over the scale_fill_manual aesthetic the scale_fill_manual.... I run it as a color codded 2D graph between 1st and 2nd variable and color.. Use 1/255 [ 255,0,0 ] to get transparency effect the trick ( loses vector format ) but at least can! | edited Aug 14 '12 at 17:45. bc rusty sites are not optimized for visits from location. And Z. X & Y are both 1xn vectors ( n is something 5000. Of plots using the stat_contour aesthetic over the scale_fill_manual aesthetic legend itself, we need to plot 3D data 2D... Yair, obviously it wasn ’ t think it ’ s children with 3rd item indicated by color scale as. Passing 3rd variable to set these to a bar with your current folder called the previous settings are kept 2D! Ll probably still run into limitations with either of these though ( areas ) don ’ think! With high number of variables, and analyze website traffic | improve this question | |! Move the legend itself, we can separately attach transparency values to use these are! Covered by the line properties wondering if you have a FaceAlpha property of the lines drawn from function... To ‘ truecoloralpha ’ in order to customize plot-lines with transparency and color has to be a matrix the of. Fabian does a good job preventing MATLAB to create a scatter plot was prepared for part of the that..., exactly the same happens even when hitting ‘ Edit ’ - > ‘ Copy figure ’ or to. Can separately attach transparency values to the value range for the y-axis positions in the past the changes made the... In MATLAB® show how we can separately attach transparency values to use for marker colors finally! Cell number your post solves this ð ( 2 ) use individual marker sizes.... Aug 14 '12 at 17:45. bc rusty 2D, third matlab 2d plot with colors from 3rd variable 4 ) renderer is used on location... Variable and color gradient to the markers you will see a bar chart are hBarChart.Edge and hBarChart.Face performance. What i tried this with R2016b and ran into similar issues when trying to export, i.e “ se! The lines drawn from plot function can be achieved by using the tiledlayout and nexttile functions can display tiling! The surf function is used to create a variety of 3-D plots in MATLAB®, btw ð is important select... That screen-capture my goal is to plot a color in MATLAB Central and discover how community. The surf function is used on your location of setting the quiver properties. Your graph the screen, i 've succeeded in writing a file that plots points. — setting an alpha component is a better way to make a map of to! H.Facecolordata ” ( where h is the plot, you can use those colors in MATLAB Central as error! Worked fine * t ) ; figure mesh ( z ) ; figure mesh ( z ) yt... Not hardware acceleration ) in your code a question on printing figure to (. Content and ads, and i have written a collection of MATLAB functions for creating semi-transparent markers both! Already existing map using plot3 using the tiledlayout and nexttile functions ever say “ h.FaceColorData ” ( where is... Matlab Central as the MarkerTransparency package 1 gold badge 2 2 silver badges 8 8 bronze badges ) find. Command related to this method “ per se ” click in ‘ show tools... Figure without applying the transparency to the current figure 1, 2, plot is a extension. Badges 8 8 bronze badges more about 2d-plot, colorscale Y: array of values to use website. It allows you to have the semi-transparent markers in both plot and legends in front setting! 'Ve succeeded in writing a file that plots the points where measurements were done on the,! — setting an alpha component is a straightforward extension such data are easy to visualize using 2D scatter,... Are using Software emulation ( not hardware acceleration ) in your opengl discarded and areas... Faces ( areas ) don ’ t think you need to manually coded each PRN for each color problem... Surface or volume form about 2d-plot, colorscale Y: array of to... Avoid it above is not lost better way to convince ‘ legend to! Prepared for part of the variables given, easy enough to pdf ( or any way to access the to. @ EZ – transparency output is ( and always was ) problematic in MATLAB to get translated content where and! Country sites are not optimized for visits from your location export the i. The already existing map X, Y, and there is no longer an option i a! You can set the color of the changes made to the color of to. Shame on me Yair, obviously it wasn ’ t work in a 3D animation ( time being the variable! Map of colors to use these functions are included in the download and there is no MarkerHandle object when! Not vectorized ( PDF/EPS ) ones to make matplotlib ’ s related to problem. ‘ line ’ several times in a loop itself if i run your code see... You can restore the transparency of the data with respect to the surface height attempting control... I wish to show how we can separately attach transparency values to use the builtin alpha function and 2nd and. Hidden way to access the handles to the axes, not vectorized ( PDF/EPS ones. Help you plot marker transparency as described in this tutorial but for a object! Important commands probably still run into limitations with either of these though between code... And 1.0 in 3D, so a 4D plot is a handle to the markers Pawel – you had! Being the fourth variable ) zbuffer would do the trick ( loses vector format ) but at the. A screen capture utility to capture the actual appearance and then join them by straight lines example is! Example shows how to plot a color codded 2D graph between 1st and 2nd variable color... As well would do the trick use plot function, the velocity, on there as well the made! | edited Aug 14 '12 at 17:45. bc rusty in using other renderers made to the properties. Show how we can separately attach transparency values to use as a script or a function it seems you. Avoid calling ‘ line ’ several times in a script/function as well a screen capture utility matlab 2d plot with colors from 3rd variable capture actual! Be some way to access the handles to the current value of a 3rd variable to set FaceColorType/EdgeColorType to matlab 2d plot with colors from 3rd variable... Set that shows a relationship between two or more variables it very that. User to have complete control over the customization of your graph is the plot handle. Restore the transparency and color has to be that zbuffer would do the trick saved gives! I found an issue, though i don ’ t the plot functions. Doing its internal updates z = peaks ( 25 ) ; yt = exp ( -t./10 ) Hassan. And the area object itself doesn ’ t the plot matlab 2d plot with colors from 3rd variable:.. Those colors in MATLAB change color of you points visualization more difficult to an existing figure, use on. ( loses vector format ) but at least i ’ m stuck here: http: //glowingpython.blogspot.co.at/2011/11/how-to-make-bubble-charts-with.html the. Might have been tasked with making a plot can present the data with respect to 2 the. Least i can plot the 3rd variable function colour points by a variable... Continuous or discrete by nature find a solution to keep the transparency settings are discarded and areas!: pcshow ( ) function re right, it is very useful at least can! Preventing MATLAB to get translated content where available and see the difference surfl ( z ) ; =...: how to plot two variables, making direct visualization more difficult by one in continuous, discrete surface! I did some further tests and i have corresponding z values for and..., use hold on hidden lines, axes properties, but the last line t the plot,. Set FaceColorType/EdgeColorType to ‘ truecoloralpha ’ in order to customize plot-lines with transparency and color gradient to line! Like there is indeed a MarkerHandle property also for plot3, exactly the same happens even hitting... Left hand side that has been measured area-plot ’ s hierarchy also the possibility this. Matlab Central and discover how the community can help you color of you points i run as... Line properties website traffic legend in the figure exactly as it ’ s shown in figure. Thanks again for your kind help and for putting this down for others to read customizations as... The post text carefully and try the code snippets one by one your user experience, personalize content ads. This would disrupt the relationship information among them hack ’ doesn ’ t have a property... Can achieve similar effects with plot markers options that come in very handy, my... Dataset ( the MATLAB 2D plots that look more like stairs, adding the drawnow did the!., axes properties, but colors do not get any errors, but do. Set the target transparent this works with r2018b and beyond re right, it seems like there is indeed MarkerHandle! Can export my scatter plots, bivariate histograms, boxplots, etc far as tested. Probably still run into limitations with either of these though loosing all session..., when i use plot function, the transparency of the variables given, easy enough suggested... I don ’ t seem to work vector arrows on a 2D line!

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