how can i declare variables in for loop

2015 6 20
3 个回答
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更新时间：2019 6 19
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0 个投票

hi everyone I want to write a function to deal with image which has been divided to N regions with regionprops function : imageregion = [1 2 3 4 ... n] , for every region i in that image I want to declare variables using for loop like this
for i=1:N
vector1=ismember(labelimage,1)>0;
vector2=ismember(labelimage,2)>0;
.
.
vectorn=ismember(labelimage,n)>0;
end
I try to apply that code but i failed . could any help me thank you

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Jan
Jan 2015-6-20
What did you try exactly? You've posted pseudo-code and did not explain if you got an error message of if the results differ from your expectations. "I failed" is not clear enough.
majed majed
majed majed 2015-6-21
what i want exactly is to delete some regions which has particular properties from that image and leave the others . the regions number is not consonant,its differs from image to image. thank you for your help
majed majed
majed majed 2015-6-21
编辑：majed majed 2015-6-21
instead of that , does MATLAB has a function to remove undesired regions ( small regions or the area we wish) from a binary image to another one ?

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更多回答（2 个）

Jan
Jan 2015-6-20

0 个投票

Please read: FAQ: How to create variables in a loop
Short summary: Don't do this! Use an array instead of a pile of variables with an index hidden in the name.
Image Analyst
Image Analyst 2015-6-20

0 个投票

There is no reason to do that. You are extracting individual blobs one at a time into "n" binary images with just one blob. Then you're doing that same thing "N" times. There is no reason to do it more than once, and there is not even any reason to do it once. You don't need n images, and don't need to generate n images N times. Why do you think you need to do this? What do you think it will allow you to achieve?

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majed majed
majed majed 2015-6-21
what i want exactly is to delete some regions which has particular properties from that image and leave the others . the regions number is not consonant,its differs from image to image. thank you for your interest
Image Analyst
Image Analyst 2015-6-21
Then use a cell array. See the FAQ http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F and see my Image Segmentation Tutorial in my File Exchange http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862. In there I show you how to filter blobs based on certain feature values.

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