[Octave-bug-tracker] [bug #37410] image.m has a wrong check for linearly-spaced x and y

[Andreas Weber]

Follow-up Comment #5, bug #37410 (project octave):

I guess your testcase is

n = 743;
img = rand (n)*255;
x = y = linspace (0, 10.43, n);
image(x, y, img)


Why do we need std in the linearity check? Isn't something like

tol = 10 * eps;
dx = diff (x);
dy = diff (y);
dx_maxmin = max (dx) - min(dx);
dy_maxmin = max (dy) - min(dy);
if (dx_maxmin > tol || dy_maxmin > tol)
...


sufficient? Regards, Andy

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