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Improve performance, use logical indexing instead of FIND?!!

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Mohammed
Mohammed 2014-9-22
回答： Image Analyst 2014-9-22
I was trying to improve my code but there is a message for the following code that I do not comprehend it. Any Solutions/idea/explanation?!
indices = find(NSet(:,4)~=0);
NSet = NSet(indices,[2:3, 5:clmNSet]);
Message: "To Improve performance, use logical indexing instead of FIND"
Thanks.

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Image Analyst
Image Analyst 2014-9-22
You don't need find. Use logical indexes:
logicalIndices = NSet(:,4)~=0;
NSet = NSet(logicalIndices,[2:3, 5:clmNSet]);

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