MATLAB: Side-by-side Bar Graph Colors

colorgraph

Y = [-3,-2;2,1;1,-1;4,3;-1,4];
bar(Y);

The above produces a graph with 5 X-axis ticks, each tick having 2 bars placed side by side. How can I specify the colors of each bar? That is, at each tick, I want the left bar to be a certain color and the right bar to be a certain color.

Thank you.

Best Answer

This works:

Y = [-3,-2;2,1;1,-1;4,3;-1,4];
hb = bar(Y);
hbc = get(hb, 'Children');
set(hbc{1}, 'FaceColor', 'r')   % Red bars for first column
set(hbc{2}, 'FaceColor', 'g')   % Green bars for first column

Related Solutions

MATLAB: How to explicitly change the colors of the bars in a stacked bar graph

You can use the Color Data (CData) property for bar graph released in R2017b.

You can change the color for a particular bar by setting the FaceColor property to 'flat'. Then, change the corresponding row in the CData matrix to the new RGB triplet. Here is the link for the CData property in bar graph:

https://www.mathworks.com/help/matlab/ref/bar.html#input_argument_namevalue_d119e63137

For example,

a = [1,3,6;2,5,6;8,2,1];
H=bar(a, 'stacked');
colorSet = [];
for i = 1:3
    myColors = round(rand(3,3),1);
    colorSet = [colorSet myColors];
    H(i).FaceColor = 'flat';
    H(i).CData = myColors;
 end
This will display the stacked bar plot with different colors.

MATLAB: Changing bar graph bar colors

By default, all the bars in a bar graph are part of the same patch object, and therefore are the same color. To get different colors, you need to plot each bar as its own object.

x = 1:4;
y = rand(1,4);
h = bar(x, diag(y), length(y));
set(h, {'facecolor'}, {'k','b','g','r'}');

h = bar(x, diag(y), 'stacked');
set(h, {'facecolor'}, {'k','b','g','r'}');

Best Answer

Related Solutions

MATLAB: How to explicitly change the colors of the bars in a stacked bar graph

MATLAB: Changing bar graph bar colors

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