MATLAB Central Newsreader - mean of a single column?

mean of a single column?

Michael — Fri, 12 Sep 2008 13:22:01 -0400

I know I can find the mean of the all the rows and colums of a matrix with

X =

1 2 3
3 4 6

mean (X,1) % column
mean (X,2) % row

What is the command to find the mean of a single column within a matrix?

Re: mean of a single column?

Christian Zietz — Fri, 12 Sep 2008 13:38:48 -0400

Michael schrieb:

> What is the command to find the mean of a single column within a matrix?

Are you looking for

mean(X(:,1))

Christian
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Re: mean of a single column?

someone — Fri, 12 Sep 2008 13:41:01 -0400

"Michael " <michael.lisowski@gentex.com.extrachar> wrote in message <gadqdp$ekv$1@fred.mathworks.com>...
> I know I can find the mean of the all the rows and colums of a matrix with
>
> X =
>
> 1 2 3
> 3 4 6
>
> mean (X,1) % column
> mean (X,2) % row
>
> What is the command to find the mean of a single column within a matrix?

>> X = [1 2 3 ; 4 5 6]

X =

     1 2 3
     4 5 6

>> avgX1 = mean(X(:,1))

avgX1 =

    2.5000

>> avgX2 = mean(X(:,2))

avgX2 =

    3.5000

% etc ...

Re: mean of a single column?

Michael — Fri, 12 Sep 2008 13:58:02 -0400

Thanks. That did the trick. I thought I tried that but whatever.

>
> mean(X(:,1))