Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: how apply bsxfun to all the rows of a matrix?
Replies: 2   Last Post: Dec 27, 2011 7:00 PM

 Messages: [ Previous | Next ]
 andalibar@gmail.com Posts: 17 Registered: 2/28/07
how apply bsxfun to all the rows of a matrix?
Posted: Dec 27, 2011 5:39 PM

hello everybody

let me ask my question though the following example:

test=[1 1 1 1; 2 2 2 2; 3 3 3 3;4 4 4 4]

test =
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4

rowDiff=bsxfun(@minus, test, test(1,:)) % for the first row of test

rowDiff =
0 0 0 0
1 1 1 1
2 2 2 2
3 3 3 3

sum(rowDiff.^2,2)'

ans =
0 4 16 36

How could I repeat the above for all the rows of test, without any
loop in the code?

At last, please let me express my appreciation to the people in this
great google group, and my special thanks to Bruno Luong and and Matt
J for their invaluable comments and solutions to my previous
questions.
Aseman

Date Subject Author
12/27/11 andalibar@gmail.com
12/27/11 Matt J
12/27/11 andalibar@gmail.com