How do I add column vector to a matrix ? Documentation examples does not work.

I copied this example directly from the documentation and it returns error "Matrix dimensions must agree". What is going on? A = [1 2 3; 4 5 6] A =

     1     2     3
     4     5     6

b = [10; 100] b =

    10
   100

A + b ans =

    11    12    13
   104   105   106

Answer 1

[Steven Lord]

Implicit expansion was added as a feature in MATLAB in release R2016b. You're using an older release, one in which you would have to use the bsxfun function to explicitly ask for the same expansion behavior for vectors and matrices.

[Guillaume]

in other words, in older versions:

bsxfun(@plus, A, b)

Answer 2

[dbmn]

hi,

this works like this

A=[A, b]

[norcalpedaler]

Please re-read my OP. I want to compute the sum column by column.

[dbmn]

Sorry, i understood that the wrong way.

I might still not fully understand it. Can you give an example of how the output should look like?

Something like this?

sum(A+b)

ans =

   115   117   119

Or this?

cumsum(A+b)

ans =

      11    12    13
     115   117   119

Or this?

cumsum(sum(A+b))

ans =

     115   232   351