using RGB colour code while looping plots

Hi,

while plotting different arrays in a loop I assigned them different colours. But as the contrast between the different colours is not very good, I´d like to have the colours in RGB code instead of the predefined 'r', 'k', ...

j = 1;
k = 1;
str = {'A1', 'A2', 'A3', 'A4'};
col = {'r', 'k', 'g', 'b'};
for i = 1:20:80
    plot(M_3(i:19+i), col{k}, 'LineWidth',1); 
    str = [str ("Graph " + str(j))]; 
    hold on
    j = j+1; 
    k = k+1; 
end

I thought of something like col = {4 31 74, 5 41 98}; but an error pops up.

Can you help me using another way to define different colours?

Answer 1

[Adam Danz]

Use one of the builtin colormaps or create your own nx3 RGB Color matrix where all values are between 0 and 1.

col = parula(4); 
for i = 1:4
    % . . . skipping stuff
    plot(x,y,'Color', col(i,:))
end

Check out a list of color maps here

https://www.mathworks.com/help/matlab/ref/colormap.html#buc3wsn-1-map