MATLAB: How to send data from one function to another

MATLABmove data between functionsnested functions

I have a function that is reading values from a .txt file using fscanf, and storing those values in an array.
Now I have another function that needs to use that array, but I am getting an error that says the variable does not exist.
Research tells me that after a function is done running, the variable leaves the workspace.
How can I pass this data into the 2nd function?
Thank you!

Best Answer

You can pass the variable out from the first function and pass it in to the other function. E.g.
% File fun1.m
function result = fun1
result = rand(3);
end
% File fun2.m
function fun2(x)
disp(x)
end
And then at the command line:
>> x = fun1
x =
    0.7577    0.6555    0.0318
    0.7431    0.1712    0.2769
    0.3922    0.7060    0.0462
>> fun2(x)
    0.7577    0.6555    0.0318
    0.7431    0.1712    0.2769
    0.3922    0.7060    0.0462
Another way is to use the 'userdata' property of the 0 process. E.g.,
% File fun3.m
function fun3
result = rand(3);
set(0,'userdata',result);
disp(result);
end
% File fun4.m
function fun4
x = get(0,'userdata');
disp(x)
end
Then at the command line:
>> fun3
    0.0971    0.3171    0.4387
    0.8235    0.9502    0.3816
    0.6948    0.0344    0.7655
>> fun4
    0.0971    0.3171    0.4387
    0.8235    0.9502    0.3816
    0.6948    0.0344    0.7655
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