MATLAB Answers

how to clear axis in for loop?

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preeti
preeti on 12 May 2015
Commented: preeti on 13 May 2015
Hi,I have an output Panel where the images are shown .At a time 25 images can be shown.But sometimes the axes are partially filled by images and I want to delete the empty axes.Suppose 3 images are present and rest of axis are empty the code is shown below for it. This is my code:-
> m=1;%for first axes
for i=4:25
cla(handles.(['axes',num2str(m+1)]));
m=m+1;
end
whats wrong here clearing only one axes? end

  3 Comments

Walter Roberson
Walter Roberson on 12 May 2015
Is it possible that the axes have objects with handles set invisible, such as colorbars ?
preeti
preeti on 12 May 2015
ya set(ax, 'Visible','off') can work but dont know its working with for loop..
preeti
preeti on 13 May 2015
@Walter pls suggest some nice soln..

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Answers (2)

Thomas Koelen
Thomas Koelen on 12 May 2015
Why would you use m instead of just using the i you already specified in your for loop?
For further work don't use i or j as variables because i and j are both functions denoting the imaginary unit:
So a variable called i or j will override them, potentially silently breaking code that does complex maths.
for your problem, you forgot a strcat, try again with
strcat('axes',num2str(i))

  2 Comments

Walter Roberson
Walter Roberson on 12 May 2015
strcat(A,B) is not needed when you use [A,B]
Thomas Koelen
Thomas Koelen on 12 May 2015
Never knew, I'm still new to matlab and didn't know you could do it like this :) Also had no computer to check it at the moment.

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Walter Roberson
Walter Roberson on 13 May 2015
If your axis might contain some items with invisible handles and you want to get rid of the items, then you need to pass the 'reset' option to cla()
cla(handles.(['axes',num2str(m+1)]), 'reset');

  1 Comment

preeti
preeti on 13 May 2015
Sir , I just need to clear axis that are empty in the output panel and sry to say reset not clearing axis in matlab.

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