Reputation: 45943
>> a = [2,3,4;6,7,8]
a =
2 3 4
6 7 8
>> mean(a)
ans =
4 5 6
where [4 5 6]
is the mean for each column
How can I get the mean for each row?
In my example, I would expect [3;7]
Upvotes: 17
Views: 31129
Reputation: 31
You can do mean (a, 2) returns : [3; 7] Trick is the 2nd parameter specifies along which dimension you want mean. 1 is default ("Column").
Upvotes: 0
Reputation: 2627
Alternatively to the other answer, you can simply use the transpose feature
>> a'
ans =
2 6
3 7
4 8
>> mean(a')
ans =
3 7
I suggest this answer over the other because it works for any row based octave function (max , min , sum , etc)
Upvotes: 5
Reputation: 500357
From http://www.mathworks.co.uk/help/techdoc/ref/mean.html:
For matrices,
mean(A,2)
is a column vector containing the mean value of each row.
In Octave it's the same.
Upvotes: 25