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How to expand a matrix depending on the file size?

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I want to plot error bars of data that can have different number of elements. But the data always contains four different types and should be plotted in four colors. For example, if data has 16 elements, the colors should be (1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4) and if the data has only 4 elements, the color index should only be (1 2 3 4). How can I have flexible indexing dependent on number of items?

Risposta accettata

Sylvain il 18 Gen 2023
Does this help ?
n = 2;
mycolors = [1*ones(1,n),2*ones(1,n),3*ones(1,n),4*ones(1,n)];

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