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Yu Li
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text in colorbar display

Asked by Yu Li
on 14 Jul 2018 at 4:13
Latest activity Edited by dpb
on 15 Jul 2018 at 0:06
Accepted Answer by dpb

Hi: I have a contour plot and a colored with a colorbar, but the exponential is inside the plot, is there anyway to refine it, for example, move it after the numbers? as shown in the figure?

Thanks Yu

  1 Comment

I don't know a method to actually solve this problem, but you could bodge this with at least two ways:

  1. Move the colorbar or axis position.
  2. Change the text labels, so the last text label is '2 x 10^{9}'. This has as a downside that you de-couple the labels from the values, so you can't easily change the caxis without having to redo this fix.

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1 Answer

Answer by dpb
on 14 Jul 2018 at 17:44
 Accepted Answer

Not sure how you managed to get the above; you don't show code so we can't reproduce it w/o a lot of effort. Without doing extra stuff at least here with R2017b, ML is smart enough to put the colorbar labels at the bottom so they don't interfere with the axis.

You can change that by using the underlying axis handle properties of the colorbar; they're hidden but accessible, a colorbar is simply another axis object underneath the hood.

hCB=colorbor('southoutside');        % save the colorbar handle
hCB.YAxisLocation='bottom';          % move the labels to bottom if not by default

You can also force the exponent to not be shown as the overall but as part of the tick marks--

hCB.Ruler.Exponent=0;                % set Exponent for numeric ruler

  5 Comments

dpb
on 14 Jul 2018 at 20:56

Isn't that what I said...??? "underneath"

That's like saying that a van is a car "underneath".

dpb
on 14 Jul 2018 at 21:30

It's the key point for the Q?, though -- there is an axes inside there to mung on properties thereof.

I'd say it's more like there's a transmission "underneath" the car and/or van...and in the R2014b doc there's

Note:   Starting in R2014b, the colorbar function returns a colorbar object. 
In previous releases it returns an axes object.

so it's not been all that long ago the fundamental nature of colorbar being an axes was obvious to all...

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