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How to add two matrices with two different dimension?

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Amin Gan
Amin Gan 2016-2-1
评论： Walter Roberson 2016-2-1
There are two matrices, A and B.
A is 1000*1000 dimension.
B is 1000*1 dimension.
Each value of A is must be add to one column of B.
For example:
A(4*1)=
1
2
3
4
B(4*4)=
10 , 20, 30,40
30,40,50,60
50 ,60,70,80
70 ,80,90,100
I want matrix C such as:
C=
10+1, 20+2, 30+3,40+4
30+1,40+2,50+3,60+4
50+1 ,60+2,70+3,80+4
70 +1,80+2,90+3,100+4
I want to use for loop because I have 1000 data, I tried it does not give me correct answers.
Thank you

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回答（1 个）

Walter Roberson
Walter Roberson 2016-2-1
You can use repmat() and then add. More efficient is using bsxfun(@plus,A,B)
  2 个评论
Amin Gan
Amin Gan 2016-2-1
I used for i=1000
bsxfun(@plus,A(:,1),B(10001,i))
end
but still gives me wrong number, can you please guide me more?
thank you
Walter Roberson
Walter Roberson 2016-2-1
You have been inconsistent about your array sizes so I cannot tell which variable is which.
If your arrays were the shape of your 4x4 example then C = bsxfun(@plus, A, B)
That is the column vector first and the full array second

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