MATLAB as a system utilizes arrays as its basic data element. Similarly, if we need to have our plot in the shape of triangles facing upward, we will subscript or color code with ‘^’ which is the code for upward-facing triangles. So as explained previously, we will simply replace ‘r’ in our code with ‘y’ for YELLOW color. Output: Now, the output will be the same as above but this time in ‘RED’ color, as shown in the below graph:įinally, let us try it for YELLOW color. To convert our graph into ‘RED’ color we will simply add ‘r’ to out code, as follows: Now let us convert it into colors of our wish. Output: The output for this function will be in ‘BLUE’ color by default as shown in the below graph. Let us now understand the use of some of the above-mentioned colors: Example #1įirst, we will plot a graph and will let MATLAB plot it with default color: It is simple to draw an inference in this case as we mostly associate the red color with danger or word of caution.īelow is the list of some letters which we can add to our code to provide the desired color to our plot while plotting in MATLAB. For example, red color can be used to show negative trends in some data and green to show positive trends. It is straightforward and easy to visualize a trend in data when it is plotted as compared to just looking at the raw figures and color-coding gives it an even stronger appeal. First, we use plot function to create a graphical representation of our data and then we use a specific code to get the graph of the desired color. As the name suggests, the purpose of colors in MATLAB is to plot the graph of a function with the desired color. The objective of this article is to have a thorough understanding of Colors in MATLAB. MATLAB comprises a number of techniques and functions to perform the above-mentioned capabilities. 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.Hadoop, Data Science, Statistics & others Where can we Use Matlab?īelow are a few areas where we can use Matlab:.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) 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. It doesn't look like you can do this easily.
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