histogram2 vs pcolor: on making the coloring of the former one smooth

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Wouter 2017-7-4

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https://ww2.mathworks.cn/matlabcentral/answers/347356-histogram2-vs-pcolor-on-making-the-coloring-of-the-former-one-smooth

评论： Floris Jansen 2020-2-18

When making a 2d graph using pcolor() or a surface plot with surf(), MATLAB evaluates the function on a grid and gives each piece of this grid a corresponding color. Adding

shading interp

makes the transitions between colors smooth, so that the grid is no longer visible.

It seems though, that this option does not work for a histogram2(), even though superficially such an object looks very similar.

Is there a way to make the output graphics object histogram2() smooth, with or without converting it into an ordinary figure?

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Wouter 2017-7-5

编辑：Wouter 2017-7-5

Thanks again for your answer. I'm most interested in how the 'global shape' of the function compares in a glimp, so the resolution as such is as good as it needs to be for my purpose. The fact that one looks smooth and the other one pixelized makes it harder to compare.

Do you mean there is a class property of histogram2 containing the Z-values?

For now, playing with options as 'EdgeAlpha' and 'ShowEmptyBins' has already given me a more useful picture than the original one.

Floris Jansen 2020-2-18

在 MATLAB Online 中打开

>> Do you mean there is a class property of histogram2 containing the Z-values?

Yes! The return value of histogram2 contains the values of the bins:

>> h = histogram2(1:5, 2:6);
>> h.Values
ans =
     1     0     0     0     0
     0     1     0     0     0
     0     0     1     0     0
     0     0     0     1     0
     0     0     0     0     1
     