Do an if statement before the call of HeatMap, and check if there is a single value in the colormap ( numel(unique(M(:)))=1), and if that happens, change your map to a single valued colormap, with the color of your choice.Do not use HeatMap at all and create an equally looking plot using e.g.Create a myHeatMap function, that does everything the original one does but with a changed functionality on the Clim property on the axes.The only ways I can think of getting out of this problem are: This function does actually define the limits of the colormap using the axes of the heatmap ( hHMAxes), but that object is not returned by the HeatMap() call, unfortunately. Maxval = min(max(obj.Data(:)), obj.DisplayRange) Maxval = min(max(abs(obj.Data(:))), obj.DisplayRange) %SCALEHEATMAP Update the CLIM in image axes Eventually it gets to a point inside plot.m where the following function is called: function scaleHeatMap(hHMAxes, obj) Now I want to change the color of second line of legend to red without changing anything in data. This is because the graph is in big loop. At the end there are same colors (both blue) for both lines which represented in the legend box however the data itself are in blue and red. Many visualization tools allow us to specify the color. The graph has two legends and plotted from a big loop. In Matlab 2013b or older (I haven't tried in 2014b) when you call HeatMap it internally goes through a process of creating axes and settin the colors and so on. MATLAB generates plots using a standard color scheme however, we can change the colors as required. I want to plot this as a bar chart using the first 2 columns, but assign colors to each bar based on its value in the 3rd column, using some form of a colormap, such that the color of each bar reflects the value in the 3rd column. Total running time of the script: (0 minutes 1.It doesn't look like you can do this easily. Each column is plotted with a different color automatically Then you can use legend to indicate columns: data randn (100, 5) figure plot (data) legend (cellstr (num2str ( (1:size (data,2))'))) Or, if you have a cell with kernels names, use. hlines ( range ( n_rows ), 3 * g, 3 * g + 2.8, color = '0.7', linewidth = 1 ) ax. If all vectors have equal size, create a matrix and plot it. text ( i + 0.4, 0.85, f " ', ** text_args ) for g in range ( n_groups ): ax. Use dot notation to refer to a particular object and property: plot (rand (3)) lgd legend ('a','b','c') c lgd.TextColor lgd. MATLAB creates plots using a default set of line styles, colors, and markers. By changing property values, you can modify certain aspects of the legend. MATLAB cycles the line color through the default color order. Here's how one can use those colors in MATLAB. Legend properties control the appearance and behavior of a Legend object. 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. subplots ( figsize = ( 6.5, 1.65 ), layout = 'constrained' ) ax. So you can use 1/255255,0,0 to get the color of red to use as a color in MATLAB. Import matplotlib.pyplot as plt from matplotlib.patches import Rectangle import numpy as np fig, ax = plt.
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