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Add a waitbar to a function execution

조회 수: 1 (최근 30일)
Mario
Mario 2017년 8월 24일
댓글: Adam 2017년 8월 25일
Hi,
I wrote a function that uses a 3D stack of images as an input, and processes them. As a result of it, a new 3D matrix is created.
I am strugling to add a proper waitbar to this, since it can take from a few seconds to several minutes to complete this task inside this function (depending on the size of the input 3D matrix of images).
I tried several different solutions, but did not succeed.
My input is a stack of 3D images called QQ(MxNxP)
h = waitbar(0,'Please wait...');
steps=size(QQ, 3); %%to extract the number of images inside 3D matrix
for step = 1:steps
A=myFunction(QQ) %%my function goes here, not sure if I need to add something like A(:,:,step)=myFunction(QQ(:,:,step))
waitbar(step / steps)
end
close(h)
How can I properly define the waitbar in order to track execution time of my function?
Thanks!
  댓글 수: 3
Samuel Vergara
Samuel Vergara 2017년 8월 24일
Maybe wour waitbar is not updating correctly. Add just after waitbar(step / steps):
updatenow
Samuel Vergara
Samuel Vergara 2017년 8월 24일
Also, about: %%my function goes here, not sure if I need to add something like A(:,:,step)=myFunction(QQ(:,:,step)) As your code is written, you just replace the value of A by the same value "steps" times.

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답변 (1개)

Stalin Samuel
Stalin Samuel 2017년 8월 24일
편집: Stalin Samuel 2017년 8월 24일
I have not found any error in the given code. I tested (Matlab 2017a) the code and wait bar working fine.Instead of your function ( myFunction(QQ) ) i used some delay.Below is the tested code
h = waitbar(0,'Please wait...');
steps=30; %%to extract the number of images inside 3D matrix
for step = 1:steps
pause(0.2) %%removed yuur function
A(:,:,step)=myFunction(QQ(:,:,step))
waitbar(step / steps)
end
close(h)
  댓글 수: 4
Mario
Mario 2017년 8월 25일
The strange thing about it is, for example if my image stack contains 10 images, the waitbar runs the function 10 times(each time incrementing the slider value by 1/10).
In other words, it is making it run multiple times, depending on the total number of images in a 3D stack.
Adam
Adam 2017년 8월 25일
You'd need to post more code. The waitbar doesn't cause anything to happen other than the waitbar to update. Anything else is in the rest of your code.

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