Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Matlab, adding columns in matrices

  1. Jan 27, 2010 #1
    1. The problem statement, all variables and given/known data

    I need to create a function for scilab which adds a row of zeros to the right of an nxn matrix, a.
    I also have to add a row of 6's at the bottom but I think i have that part down.

    2. Relevant equations

    I think ones(,) is supposed to help?

    3. The attempt at a solution

    I have tried to use ones...

    function m_1=matrix_1(a,n)

    I figure if [a;ones(1,n)] gives 1 row and n columns (at the bottom), then [a,ones(n;1)] should make n rows and 1 column. Instead I have an error 'waiting for right parenthesis.'

    I have also thought of zeros but I don't know how to add n rows of zeros since you must type [0;0;0....] for each row.
  2. jcsd
  3. Jan 27, 2010 #2
    Sorry, I realize there is a math & science software forum.
  4. Jan 31, 2010 #3
    u should do
    m= [a zeros(1,size(m,2))];
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook