MATLAB: Regarding to findall function

findfunctions

Hi, all. It might be a simple question for you, but I got confused on the following sentence:

findall(0, 'type', 'figure').

what this 0 means?

Thanks a lot!

Best Answer

The 0 stands for the root of the graphic object system, the parent of the figures. You would use 0 for findobj or findall if you want to search over all figures.

You might also see reference to groot. groot is the newer name for the graphics root, and you can use either groot or 0 for R2014b or later. Eventually the ability to use 0 might go away, but I would not expect that for years yet.

Related Solutions

MATLAB: Image invisible

Hide:

set(gca,'visible','off') %hide the current axes
set(get(gca,'children'),'visible','off') %hide the current axes contents

Show:

set(gca,'visible','on') %show the current axes
set(get(gca,'children'),'visible','on') %show the current axes contents

If needed replace gca by the handle of the axes you wish to work with

MATLAB: @findall in an arrayfun

The cellfun function is likely a better option.

Experiment with something like this:

Out = cellfun(@(x)findall(0,'Tag','img'), a, 'Unif',0);

It will likely be necessary to experiment with that to get it to work with your images.

I cannot test this with your images, so I am posting it as UNTESTED CODE. (If it or some version of it does not work in your application, I will delete my Answer.)

Best Answer

Related Solutions

MATLAB: Image invisible

MATLAB: @findall in an arrayfun

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