help with this problem

hello,

i'm working on appdesigner

i want to add a push button which allow me to load mat file and show its elements in the workspace

for example i have ''example.mat" it conatins 03 matrix A,B and C

i did this

[file,path] = uigetfile('*.mat', 'Select a File');
if isequal(file,0)
    disp('User selected Cancel')
else
    load(fullfile(path,file))
    assignin('base',file)
end

but i got this error

Error using assignin
Not enough input arguments.

Error in app1/LoadButtonPushed (line 18)
                assignin('base',file)
 
Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 335)
Error while evaluating Button PrivateButtonPushedFcn.

how can i solve this problem

Answer 1

[Jan]

The error message is clear: See doc assignin to see, that it requires 3 arguments:

data = load(fullfile(path,file))
assignin('base', 'data', data)

It is much safer to catch the imported data in a variable instead of polluting the workspace. Imagine the MAT file contains a variable called "assignin". Then the line: assignin('base', 'data', data) shows the evil problem.

By the way, do not use the important Matlab function "path" as name of a variable. This can cause serious problems, when you debug the code.

[Abdelmalek Benaimeur]

i did this and i got a struct which contains all the matrix

is there a way to obtain all the matrix in the workspace and not a struct wchich contain them ?

Answer 2

[Ruba]

how the solvw a problem (Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback

Error while evaluating Button PrivateButtonPushedFcn.)?