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% For version1, we can get the expected answer. but for version2, p==0.3 and p==0.7 give us all zeros?
% What's wrong here? Any comments are welcome!
%% compare version1 and version2
%version1 p = 0.1:0.1:0.9; for q = 0.1:0.1:0.9 r = (p==q) end
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It's discussed in the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F