Create a Slanted Linspace Matrix

Question

0 个投票

Hi All, I am trying to generate noise in an image, and need a matrix of the form:

1 2 3 4

2 3 4 5

3 4 5 6

4 5 6 7

up to 1024x1024. Is there an east way to create this?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

Answer 1

Stephen23 2021-1-20

0 个投票

hankel(1:4,4:7)
ans = 4×4
     1     2     3     4
     2     3     4     5
     3     4     5     6
     4     5     6     7

Answer 2

Daniel Pollard 2021-1-20

0 个投票

If you have the signal processing toolbox, the buffer command will do exactly what you want.

If not, something like

x = linspace(xmin, xmax, numx);
matrix = zeros(numx, numx);
for ii = 1:numx
    matrix(:, ii) = x + ii - 1;
end

should do the trick.