How to modify each matrix of a randn(:,:,:)
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From: Steven Lord on 18 Jun 2010 14:35 "Yukiko Shimizu" <yk.mizu(a)gmail.com> wrote in message news:hvg97g$gp$1(a)fred.mathworks.com... > "James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message > <hvg8n7$rmd$1(a)fred.mathworks.com>... >> "Yukiko Shimizu" <yk.mizu(a)gmail.com> wrote in message >> <hvg6qk$t4e$1(a)fred.mathworks.com>... >> > Hi everyone. Right now my program acts upon one input. I want to make >> > it general though by using the randn option so that I can input one >> > matrix or a random number of made up matrices. How can I make it so >> > that my code acts on all of the matrices say for randn(:.:.4)? >> >> I don't understand the question. Please post a more detailed question, >> preferably with examples. >> >> James Tursa > > So my original input is a matrix A=[2;3;4]. But Now I want to make it so > that my program will take an input randn(3,1,3) for example. I want to get > three outputs since the input now is three random matices. But when I run > it, my program accepts the three matrice input but only gives me one > matrix. I'm guessing my program only acts on the first of the generated > random matrices. So you want to call your function f with B = randn(3, 1, 3) and have f operate first on B(:, :, 1) then on B(:, :, 2) and finally on B(:, :, 3)? B = randn(3, 1, 3); % I'm going to assume your function returns a scalar (1-by-1) value results = zeros(1, size(B, 3)); for whichpage = 1:size(B, 3); Atemp = B(:, :, whichpage); results(whichpage) = callMyFunctionOn(Atemp); end You can, of course, eliminate the temporary named variable if you wish. -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ To contact Technical Support use the Contact Us link on http://www.mathworks.com
From: Oleg Komarov on 18 Jun 2010 15:17
"Yukiko Shimizu" <yk.mizu(a)gmail.com> wrote in message <hvg97g$gp$1(a)fred.mathworks.com>... > "James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message <hvg8n7$rmd$1(a)fred.mathworks.com>... > > "Yukiko Shimizu" <yk.mizu(a)gmail.com> wrote in message <hvg6qk$t4e$1(a)fred.mathworks.com>... > > > Hi everyone. > > > > > > Right now my program acts upon one input. I want to make it general though by using the randn option so that I can input one matrix or a random number of made up matrices. How can I make it so that my code acts on all of the matrices say for randn(:.:.4)? > > > > I don't understand the question. Please post a more detailed question, preferably with examples. > > > > James Tursa > > So my original input is a matrix A=[2;3;4]. But Now I want to make it so that my program will take an input randn(3,1,3) for example. I want to get three outputs since the input now is three random matices. Here you're wrong: randn(3,1,3) "is" one three dimensional matrix. Oleg |