How can I send data from one function to another?
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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!
1 个评论
amine&&
2016-7-5
What is the data type that is in the .txt file?
采纳的回答
James Tursa
2016-7-6
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
3 个评论
Michael cornman
2016-7-6
Michael cornman
2016-7-6
James Tursa
2016-7-7
You can use a structure. E.g., the fieldname of the structure would indicate which variable you are dealing with. In this case when you want to set a variable, you would get the structure first, assign the field to your new value, then set the structure back.
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