Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

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

Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Subtract values in a matrix
Replies: 6   Last Post: Nov 19, 2012 12:20 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Steven Lord

Posts: 17,945
Registered: 12/7/04
Re: Subtract values in a matrix
Posted: Nov 19, 2012 12:20 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"Bob Ferreira" <migmick2000@hotmail.com> wrote in message
> Hi there!
> I need really need some help on this,
> I have a matrix which has "L" lines and "C" columns. I want to subtract
> each value in the matrix by the value the first value in the first line of
> its column, and give me a matrix with those value, with the first values
> of the first line being "0".
> Example: m = [2,2,2;3,3,3;4,4,4] the matrix given should be
> [0,0,0;-1,-1,-1;-2,-2,-2]
> I hope I made myself understood, if not, please ask away.
> Thank you for your time.

m = [2,2,2;3,3,3;4,4,4];
m2 = bsxfun(@minus, m(1, :), m)

Steve Lord
To contact Technical Support use the Contact Us link on

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum 1994-2015. All Rights Reserved.