change bar chart size in matlab in matlab

You can change the size of a bar chart in MATLAB as follows:

main.m
% create a sample data
x = [1, 2, 3, 4, 5];
y = [10, 15, 5, 20, 8];

% create a bar chart
b = bar(x, y);

% change the size of the bar chart
b.BarWidth = 0.5; % change the width of the bars
b.BaseValue = 0; % set the base value to 0
b.FaceColor = 'flat'; % change the bar colors
b.CData(2,:) = [1 0 0]; % change the color of the second bar to red
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In the above code, b.BarWidth controls the width of the bars. A value of 1 makes the bars span the entire x-axis range, while a value smaller than 1 will make the bars thinner than the default. b.BaseValue sets the base value for the bars, and b.FaceColor controls the color of the bars. The b.CData property changes the color of individual bars, where the row index selects the bar to be changed and the 3-element column vector sets the RGB color values.