Is the upper limit of a color bar the true maximum value of the data in the color map, or is it larger ?

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J.S. 2018-6-7

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回答： Kelly Kearney 2018-6-7

Reason for asking: When an ordinary graph is plotted, the x and y axis limits are often larger then the maximum values of my data. Does the same thing apply to color bars, or is the upper limit obtained via caxis exactly the same value as the maximum data value?

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Answer 1

Kelly Kearney 2018-6-7

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The color limits are usually set to match the plotted data for most standard functions (pcolor, surf, imagesc, etc), although there may be some specialized functions out there that do some rounding. You can verify by getting the color limits from the axis in question:

get(ax, 'clim')

or

ax.CLim

and compare that to your data in question.