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Get the mean of the matrix and extract the elemnts fromthe matrix that are greater than the mean

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Pankaja Tanjore 2015-2-20

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评论： Elias Gule 2015-2-20

采纳的回答： Mischa Kim

Hello,

I have a matrix C=[50; 20; 50; 70; 30]; Now i want to find the mean of the array. mean_val=mean(C); I get the meanvalue as (mean_val=46) Now i want check if any of the elements in matrix C are greater than 46. If they are greater than 46 then extract those values from the matrix and get a new matrix excluding the elements which are greater than the mean value.

output Array after extracting the elements grater than mean val

output=[20; 30]; please let me know the function matlab to get this. Looking forward to hear from you

Thanks Pankaja

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Mischa Kim 2015-2-20

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How about

ouput = C(C<mean(C))

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Pankaja Tanjore 2015-2-20

Hello,

Thanks for the reply Pankaja

Elias Gule 2015-2-20

Mischa's answer is correct: try the following:

tic; output = C(C<sum(C)/length(C)); t0 = toc; tic; output = C(C<mean(C)); t1 = toc;

you should see that t1>t0. WHY? FYI: type edit mean.m in the command window to see the implementation of the mean function.

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