Creating a handle.object from a string

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christopher bilham 2017-12-8

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编辑： Stephen23 2019-8-18

I am trying to specify 1 of 19 axes in a GUI in a for loop. Depending on the data (randomly organized) it needs to be sorted to its appropriate axes. My sorting is working but I do not know how to reference the correct handle.axes in the loop. In my case they are axes(handle.tileN); N = 1:19.

 axes(handles.tileN);
    image(TEX)
    axis off
    axis image
I generate a string for each handle;

use = strcat('handle.tile',N)

This generates the correct string 'handle.tile1' if n=1; but I can not figure out how to then make this the correct handle. How do I make axes(handle.tileN); N = 1:19 correctly call objects?

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Stephen23 2019-8-18

编辑：Stephen23 2019-8-18

在 MATLAB Online 中打开

The simplest and best solution is to change your code slightly, and use an array of handles:

H = gobjects(1,19); % or nan(...) for pre R2014b versions.
for k = 1:19
    H(k) = axes(...)
end

and then you can trivially use indexing to access each axes.

https://www.mathworks.com/help/matlab/creating_plots/concatenating-handles-into-arrays.html

https://www.mathworks.com/help/matlab/ref/gobjects.html

"use = strcat('handle.tile',N) This generates the correct string 'handle.tile1' if n=1..."

I would be very surprised if that worked. It certainly doesn't when I try it:

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Answer 1

BK 2019-8-18

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编辑：BK 2019-8-18

Likely there is a more elegant solution, but the following worked for me on a similar problem. Create a cell array where elements are handle objects (not the string names), then loop through as needed.

ax = {handles.axes1, handles.axes2,...};

for idx = 1:max_idx

imagesc(ax{idx},A);

ax{idx}.XAxis.Visible = 'off';

end