Adding text programmatically to a figure

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Pappu Murthy 2022-1-3

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评论： ST 2023-7-1

I have a figure with several subplots in it. I want to place a textbox with some text init which belongs to the entire figure. However, whenever I try to use the text command to place the text, it places it relative to the current subplot but not to the overall figure. How do I overcome this nuance?

Thanks in advance.

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Answer 1

DGM 2022-1-3

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编辑：DGM 2022-1-3

在 MATLAB Online 中打开

If you just want to put a title over multiple subplots, you can use sgtitle().

If you want text in a box with arbitrary location, you can use annotations.

[x y z] = peaks(30);

subplot(2,1,1)

surf(x,y,z,'facelighting','flat');

camlight

subplot(2,1,2)

surf(x,y,z,'facelighting','gouraud');

camlight

annstr = sprintf('blah blah\nblah'); % annotation text

annpos = [0.1 0.1 0.1 0.1]; % annotation position in figure coordinates

ha = annotation('textbox',annpos,'string',annstr);

ha.HorizontalAlignment = 'center';

ha.BackgroundColor = [0.9 0.5 1]; % make the box opaque with some color

The other properties of the annotation can be set as needed.

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ST 2023-7-1

Thanx a lot!. It worked for me

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Answer 2

dpb 2022-1-3

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text() is exclusively a child of an axes, not a figure. To write text outside the boundaries of an axis, use the annotation object instead.

Or, depending upon just what you want/need for this to contain, use tiledlayout with which you can have a shared title and axes labels. Those may or may not be sufficient for your purpose.