vector division
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From: Arie Driga on 5 May 2010 17:33 I have two vectors: A=(1x11) and B is (1x2) I would like to make a matrix (2x11) the first row is each cell in A divided by B(1,1) the second row us each cell in A divided by B(1,2)
From: Matt J on 5 May 2010 17:38 bsxfun(@rdivide,A,B(:));
From: Arie Driga on 5 May 2010 17:45 "James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message <hrsnc8$17c$1(a)fred.mathworks.com>... > "Arie Driga" <a_driga(a)yahoo.com> wrote in message <hrskq9$brb$1(a)fred.mathworks.com>... > > I have two vectors: > > A=(1x11) > > and B is (1x2) > > > > I would like to make a matrix (2x11) > > the first row is each cell in A divided by B(1,1) > > the second row us each cell in A divided by B(1,2) > > bsxfun(@rdivide,A,reshape(B,[],1)) > > James Tursa I did it by B'*A=C then I have 2x11 matrix, then I have another vector: D(1x2) I want to multiply all the element of 1st row in matrix C with D(1,1) and the 2nd row with D(1,2) How to do that?
From: Arie Driga on 5 May 2010 18:21
"Arie Driga" <a_driga(a)yahoo.com> wrote in message <hrsot3$9ng$1(a)fred.mathworks.com>... > "James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message <hrsnc8$17c$1(a)fred.mathworks.com>... > > "Arie Driga" <a_driga(a)yahoo.com> wrote in message <hrskq9$brb$1(a)fred.mathworks.com>... > > > I have two vectors: > > > A=(1x11) > > > and B is (1x2) > > > > > > I would like to make a matrix (2x11) > > > the first row is each cell in A divided by B(1,1) > > > the second row us each cell in A divided by B(1,2) > > > > bsxfun(@rdivide,A,reshape(B,[],1)) > > > > James Tursa > > I did it by B'*A=C > > then I have 2x11 matrix, then I have another vector: D(1x2) > I want to multiply all the element of 1st row in matrix C with D(1,1) and the 2nd row with D(1,2) > > How to do that? I found the answer: E=bsxfun(@times,C,reshape(D,[],1)) thanks James for telling about the "bsxfun" -case closed- |