Vector addition with 2-dim array

A is an R by C (R x C) array and I have a rows vector V with length C. I want to add or subtract V from every rows in the array A.
Is there any way to simplify this procedure?
Of course I know some method like:
VV = V(onese(1:R), :)
result = A +/- VV;
but I just wanted an one-line command or operator, like:
result = A V
result = somefunction(A, V);
I need to find ※ or somefunction()

댓글 수: 1

ones(1:R) creates a matrix with R dimensions and prod(1:R) elements. You mean ones(1, R).
The one-line command might have the advantage, that the matrix VV is not created explicitly:
result = A - v(ones(R,1), :);

댓글을 달려면 로그인하십시오.

 채택된 답변

Wouter
Wouter 2013년 3월 21일

0 개 추천

you could use this oneliner:
result = A - (ones(size(A,1),1)*v);

댓글 수: 1

and if v is a column vector you need to transpose v:
result = A - (ones(size(A,1),1)*v');

댓글을 달려면 로그인하십시오.

추가 답변 (1개)

Jan
Jan 2013년 3월 21일

1 개 추천

A = rand(3,4);
b = rand(1,4);
C = bsxfun(@minus, A, b);

카테고리

도움말 센터File Exchange에서 Creating and Concatenating Matrices에 대해 자세히 알아보기

태그

질문:

2013년 3월 21일

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by