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find simlar number in array

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Mohammed
Mohammed 2012-11-9
if i have a big array (ex: 4x58) and there are some simalr numbers on it. i want to find how many each number on the array has been repeted. how can matlab help me on that? could you explain step by step please?
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Matt Kindig
Matt Kindig 2012-11-9
编辑：Matt Kindig 2012-11-9
Do you mean similar numbers (as in within a certain threshold apart) or identical numbers? If identical, you can use the hist() function.
doc hist

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回答（1 个）

Matt Fig
Matt Fig 2012-11-9
编辑：Matt Fig 2012-11-9
Similar or identical? Those are different! .5 is similar to .6, but not identical.
If you mean identical, you can count how many times each number occurs like this:
A = randi(30,5,5)
N = unique(A(:));
N(:,2) = histc(A(:),N)
  2 个评论
Mohammed
Mohammed 2012-11-9
i mean identical sir.
can you tell me how can i use hist?
José-Luis
José-Luis 2012-11-9
The documentation is usually a good place to start.
doc histc

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