CMAP MATLAB HOW TO
CMAP MATLAB CODE

getPyPlot_cMap('!GetNames') returns a cellstring containing all available colormap names. the number of colors of the colormap.Ī list of colormap names is provided in the function help section. However, the advantage is that you get all the colormaps implemented in matplotlib and that you can specify the number of RGB quantization levels, i.e. python (and the matplotlib module) is required. It calls a python script that writes the colormap matrix into a temporary file, i.e. GetPyPlot_cMap returns any colormap implemented in the matplotlib python library. These are discussed in MATLAB's documentation (and elsewhere!)īut I am not discussing here.Simple Matlab and python script that import colormaps from matplotlib into Matlab. Note that you can get as fancy as you want with your own coloring =meshgrid(linspace(0,10)) įor mesh and surf, you can change 'EdgeColor' and/or 'FaceColor' to be uniform, rather than using colormaps. Warning! Once you change the colormap, it will keep that colormap for all subsequent 3D plots within the same figure or MATLAB session until you use close, or open a new figure window. This was done above when showing the previous default colormap. If using mesh(x,y,z), to change the look of it you can change to a different colormap as discussed in. Title( 'Using Other RGB colors in 2D graphs') Plot(t2,sin(t2), 's', 'MarkerEdge', 'k', 'MarkerFace',loyolagray, 'MarkerSize',9) Plot(t,sin(t), 'Color', loyolagreen, 'LineWidth',2)

Now one can use these colors to specify the color of markers, lines, edges, faces, etc. Here's how one can use those colors in MATLAB. 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. So you can use 1/255 to get the color of red to use as a color in MATLAB.

CMAP MATLAB CODE

Title( 'Using MATLAB RGB triplets in 2D graphs')įor other colors, you can look up their RGB code on many websites such as RGB Color Codes Chart or HTML Color Picker to see the RGB codes (or hex codes, etc.) For example, at these RGB Color websites, you will be given R=255, G=0, B=0 for red. From the table above, we can define the default colors to work with them or can put in the RGB triplet (as a vector) directly into the plot command. Thus knowing the MATLAB RGB triples for the colors can be useful. You can use those numbers and divide the vector by 255 to use within MATLAB. Usually RGB colors have values from 0 to 255. One can specify colors using a vector that gives the RGB triple where in MATLAB, each of the three values are numbers from 0 to 1. Thus it may be easier to use the RGB triplets, and even name them ahead of time. X1 = linspace(-10,-0.1) x2=linspace(0.1,10) Īs you may see, this could get confusing to keep track of. Others involve using the RGB triplet (see next section). One is to use the default colors and 'resetting' the order, which is shown here. Or I have a piece-wise graph that I want to have all the same color. For example, I may want some data points drawn in the same color as the curve. Many times you want to have more control of what colors are used. Title( 'Eight Basic colors (w = white not drawn)')

Legend( 'b = blue (default)', 'k = black', 'r = red', 'g = green', 'y = yellow', 'c = cyan', 'm = magenta', 'Location', 'SouthEast')

You can easily do the same thing using the long names.

CMAP MATLAB HOW TO

The eight basic colors are known by either their short name or long name (RGB triplets are also included).Įxample of how to change the color using short names is below. Title( 'Default colors for mesh BEFORE 2014b') Note that the name of this colormap is 'parula' while previous to R2014b, it was 'jet' =meshgrid(linspace(0,10)) If using mesh(x,y,z), to change the look of it you would want to change 'EdgeColor'. Title( 'Hold On Now Cycles Through Colors') See below for how to manually adjust the colors. Now it will automatically move to the next color(s). In the past, each new plot command would start with the first color (blue) and you would have to manually change the color. Legend( 'color 1', 'color 2', 'color 3', 'color 4', 'color 5', 'color 6', 'color 7', 'Location', 'SouthEast')Īnother thing that changed starting in the R2014b version is that the hold on and hold off automatically cycles through the colors. Here are the colors, in order, and their MATLAB RGB triplet. The default colors used in MATLAB changed in R2014b version. Seeįor more in-depth explanations and fancier coloring, to name just two sources. This document gives BASIC ways to color graphs in MATLAB.

Cmap matlab