Function: var,mean,std how to use on the matrix?

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x y
x y 2014-12-2
回答： Thorsten 2014-12-2
Hy , I have question about,when I get data matrix [ 100 x 4 - size ] In the statistics problems I must do for whole matrix too get mean,std,var functions - for answer the question what is the mean of data ?
data = 100 x 4
V = mean(data,1)
V =
1 2 3 4
V2 = mean(V,1)
V2 =
2.5000

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Thorsten
Thorsten 2014-12-2
Use : to convert your matrix to a vector and then use mean, var, etc:
m = mean(V(:));

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