importing matrix and variables of a m-file function into workspace directly and making a matrix name based on a variable string

Is it possible to import matrix and variables of a m-file function into workspace directly? please help also: i want to put a function in for-loop and there is a variable that is named: lable (string). lable, is the name of a matrix that in each loop, creates. for example when i=1 (first loop), lable='matrix1' .and when i=2,lable='matrix2' ,....

in function, a matrix creates with name of RESULT but i seriously need this name depends on 'lable', like: RESULT_lable . here i have 3 problems:

1- how could a string like lable add the name of RESULT matrix for being RESULT_lable to be a matrix in this name

2-now how could import RESULT_lable matrix directly into workspace( because where that I call this function, it self is a function too)

3-now after solving 1,2 it's needed writing if-end command, does this command true:

if exist('RESULT_lable')==0 %RESULT_lable must save in workspace
calling function
end

Answer 1

[Fangjun Jiang]

1. To make a new variable name, use

Name1='matrix';
Name2='label';
NewName=[Name1,'_',Name2];

2. Don't name your varialbe as 'matrix1','matrix2',... Instead, use array or cell array so you can reference it as matrix(1),matrix(2). Search for 'How can I create variables A1, A2,...,A10 in a loop?' on this page to see the guidance. http://matlab.wikia.com/wiki/FAQ

If you really need to do it, use

assignin('base',NewName,2*pi)

3. Use exist(NewName,'var') to check if an variable with the name already exists in the workspace.

[mohammad]

thanks a lot for replying

1- in this way NEWNAME is string but i want to be a data matrix name. how could convert a string to a data parameter?

2-there in no number in names of matrix. it was just examples. in each loop this matrix coming of reading a .xls file and lable is the name of that .xls file

[Fangjun Jiang]

If NewName='matrix_label',

assignin('base',NewName,2) will create a variable named 'matrix_label' in the base workspace and its value is 2.

[mohammad]

thanks, perfect

but exist not works in function and can't see workspace when using in a function

[Jan]

@Mohammad: ASSIGNIN and EVALIN causes a lot of troubles again and again. Therefore I recommend to avoid the usage, especially for beginners. Please read the mentioned FAQ link.

[Fangjun Jiang]

Like Jan said, be very careful not to abuse the usage of assignin() and evalin(). If you really need to check the existing of a base workspace variable from a function, you can do:

try

evalin('base',NewName);

catch

assignin('base',NewNaew,2);

end

[mohammad]

thanks a lot