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

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norcalpedaler
norcalpedaler 2016-11-30
评论： Guillaume 2016-11-30
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

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采纳的回答

Steven Lord
Steven Lord 2016-11-30
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.

更多回答（1 个）

dbmn
dbmn 2016-11-30
hi,
this works like this
A=[A, b]
  2 个评论
dbmn
dbmn 2016-11-30
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

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