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matrices in function output ?

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Rakesh Praveen
Rakesh Praveen on 21 Nov 2011
Commented: RB on 20 Mar 2017
hi, how to store two different matrices as an output parameter of a 'function'.
for example: function[matrix1, matrix2]= input(in1,in2) so matrix1 and matrix2 contain some m*n matrix which i obtain through my logic. how do i put these 2 matrices in my function output ? becoz when i use the above function format, output displays only 1 matrix, ie, in this case matrix1 alone.
thank you.


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Accepted Answer

Walter Roberson
Walter Roberson on 21 Nov 2011
When you invoke the function, you need to provide two variables on output:
[m1, m2] = input(in1, in2);
Note: naming a routine "input" will almost certainly lead to later problems, as "input" is the name of a MATLAB routine.
EDIT: complete example:
>> type rakeshtest
function [matrix1,matrix2] = rakeshtest(in1, in2);
matrix1 = ones(size(in1));
matrix2 = zeros(size(in2));
>> [m1,m2] = rakeshtest(rand(3,5),rand(2,4))
m1 =
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
m2 =
0 0 0 0
0 0 0 0


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RB on 20 Mar 2017
Thanks again. When I try this I get the following error:
Error using reshape To RESHAPE the number of elements must not change.
Error in mNcwish7 (line 2) xyz = reshape(xyz, 2, 6); %Convert from "12^2"-by-1 to "2"-by-"6"
Error in mYNCne7>@(t,x,y,z)mNcwish7(t,xyz,A,B,R)
Error in odearguments (line 87) f0 = feval(ode,t0,y0,args{:}); % ODE15I sets args{1} to yp0.
Error in ode45 (line 115) odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);
Error in mYNCne7 (line 9) [T xyz] = ode45(@(t,x,y,z)mNcwish7(t, xyz, A, B, R), [15 0], initial_value(:));
Thanks and regrds, RB
RB on 20 Mar 2017
Thanks so much. It works perfectly.
Regards, RB

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