Matlab: add vector to matrix

Question

I have a 3XN matrix representing a list of 3D coordinates,something like

33    33    33    33    34    34    34    34    34    35    35
17    18         


        

Answer 1

you mean like this?

D=[33    33    33    33    34    34    34    34    34    35    35;
17    18    19    20    16    17    18    19    20    16    17;
10    10    10    10    10    10    10    10    10    10    10 ];

A=[1 2 3]';

C= bsxfun(@plus, D, A)

C =

    34    34    34    34    35    35    35    35    35    36    36
    19    20    21    22    18    19    20    21    22    18    19
    13    13    13    13    13    13    13    13    13    13    13

Answer 2

Use repmat:

M = randn(3, N);           % your 3 x N matrix
v = randn(3, 1);           % your vector
r = M + repmat(v, [1 N]);  % add v to every column of M