How to solve "Index exceeds matrix dimensions" error

Hello,

I am trying to crate a loop that plots 10000 points on a set of axis at a time from a matrix with 50 columns of 10000 data points each column by column. x is a linspace of 10000 points, submat was the creation of turning a vector of 500000 data points into a 50 column matrix using the submat command.

    for j=1:1:50
      v=submat (j*10000:(j+1)*10000,j:j); %extract rows in column j
      scatter (x,v,2);
      hold all;
    end

This produces the error: "Index exceeds matrix dimensions."

Answer 1

[the cyclist]

Your indexing is missing the first set of 10,000 and going beyond the end. I think you need

(j-1)*10000+1:j*10000

as your first index.