How do I make multiple figures from one matrix of data in a loop?

I have a matrix of 4373x30 called X and need figure a plot for each three columns, so separate figures for columns 1-3, 4-6, 7-10 etc. I can of course write each plot out separately but this is very time consuming so there must be a way of putting it all in a for loop So far i have:

for i=1:3:28
    for j=3:3:30
        figure;
        plot(X(:,i,j)

    end
end

but this just plots hundreds of figures and I'm not sure why?

[Stephen23]

Note that it is best to avoid using i and j for loop variable names, as these are both names of the inbuilt imaginary unit .

Answer 1

[dpb]

You're looping over two indices for some reason and creating a figure every pass...to just do groups of columns

nCols=3  % for generality if change number
for iCol=1:nCols:size(X,2)
  figure
  plot(X(:,iCol:iCol+nCols-1)
end