image(x,y,A) fails on log axis depending on axis's limits
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Luca Amerio
on 9 Apr 2018
Commented: Walter Roberson
on 17 Apr 2018
Hi The question is pretty much self explanatory given the following example
The following code works:
figure
A = rand(200,200,3);
axes('XScale','log','YScale','log')
hold on
image([1e1 1e2],[1e2 1e4],A)
The following code doesn't work:
figure
A = rand(200,200,3);
axes('XScale','log','YScale','log')
hold on
image([1e1 1e2],[1e2 1e5],A)
The only difference between the two codes is the y coordinate of the top corner (1e4 in the first example, 1e5 in the second).
Why does this happen and how can I fix it?
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More Answers (1)
Walter Roberson
on 9 Apr 2018
XData and YData are locations of pixel centers. You have to use the upper and lower values and the resolution to calculate where the lowest edge of the pixel would be. If it would be 0 or negative then the image cannot be displayed on a log plot.
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