How to display colorbar label with App Designer

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Marco Furlan
Marco Furlan 2019-7-5
评论： Jan S 2021-11-8
Hi,
I'm trying to display the colorbar label in an axis from App Designer but the text goes outside the limits and is not properly displayed as shown below:
The code I'm usig:
c = colorbar(app.UIAxes)
colormap(app.UIAxes, jet)
c.Label.String = 'Example Color Label';
Screenshot_2.png
How can I properly display the label?
Thanks.

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采纳的回答

Yogesh Khurana
Yogesh Khurana 2019-7-18
Hi,
You can try editing axes font size to a value less than the default value that is 12. If you change the axes font size, then MATLAB automatically sets the font size of the colorbar to 90% of the axes font size. I have written the following code to change axes font size:
c = colorbar(app.UIAxes);
colormap(app.UIAxes, jet);
c.Label.String = 'Example Color Label';
app.UIAxes.FontSize = 10;
The output of above code is:
Another way is to set the position of colorbar manually using Position property of colorbar.
You can also refer to documentations of Axes properties and Colorbar properties:
Axes Properties: https://www.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html
Colorbar Properties:
https://www.mathworks.com/help/matlab/ref/matlab.graphics.illustration.colorbar-properties.html
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Chris Oreinos
Chris Oreinos 2019-10-14
I contacted the Mathwors support and was given the following 2, still not-satisfying workarounds:
% Workaround #1
% Move the colorbar y axis label to the left.
hFig = uifigure;
hAxes = uiaxes(hFig);
imagesc(hAxes, magic(5))
hClr = colorbar(hAxes);
hClr.Label.String = 'Magic numbers';
hClr.AxisLocation = 'in';
% Workaround #2
% Expand the width of the outer position of the axes a bit
hFig = uifigure;
hAxes = uiaxes(hFig);
imagesc(hAxes, magic(5))
hClr = colorbar(hAxes);
hClr.Label.String = 'Magic numbers';
hAxes.OuterPosition(3) = 500; % Change this value to fit your needs
On a positive note though, they confirmed that this is a known bug for their development team. Nonetheless, there was no time frame for solving that bug.
Jan S
Jan S 2021-11-8
I have the same Problem now. Using the Colorbar with "eastoutside" will lead to a half cutted Colorbar-Label. All other possibilities (north, west, south and inside) aren't really helpfull, because there are axis-Labels and titles from the graph.
I try to use a X-Label for the Colorbar instead which worked well - until i implement the oportunity to switch between a linear and log scale for the colorbar. If i change to log scale, the XLabel will disappear completely. Another Bug maybe? This only works for linear scale.
To the proposed solution from matlab:
Switch the Colorbar-axis-location inside isn't a helpfull solution since it will overlap with the image/graph. Working with resizing in a dynamic app with grid structure is also impossible.
If anybody has a good solution, it would be nice, of he/she can share it until the bug isn't fixed.

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