how can I get the mean of each two columns of a matrix ?

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Niki
Niki 2016-7-8
评论： Star Strider 2016-7-8
I have a big matrix and I want to get the average of each 2 columns,
Is there any function to do that ?

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Star Strider
Star Strider 2016-7-8
I’m not quite sure what you want.
See if this works for you:
M = randi(99, 10);
RM = reshape(M, 10, 2, [])
Mmean = mean(RM,2)
  2 个评论
Niki
Niki 2016-7-8
编辑：Niki 2016-7-8
@Star Strider average of each two columns should give me 1 column . means average of each element . Let say if I have 100 columns in my original data, it should give me 50 columns
Star Strider
Star Strider 2016-7-8
I forgot a squeeze call. This will do what you want, and should work with any matrix:
M = randi(99, 10); % Create Data
RM = reshape(M, size(M,1), 2, []) % Reshape
Mmean = squeeze(mean(RM,2)) % Desired Result

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更多回答（1 个）

Thorsten
Thorsten 2016-7-8
mean(reshape(mean(X), 2, []))
  1 个评论
Niki
Niki 2016-7-8
编辑：Niki 2016-7-8
@Thorsten average of each two columns should give me 1 column . means average of each element . Let say if I have 100 columns in my original data, it should give me 50 columns

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