Loading data in a function and passing it
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Hello all. I'm trying to write a function that checks for the existence of a series of variables. If they exist, I want the function to do nothing. If they don't exist, I want the function to load them into the workspace and pass them to the main workspace. When I run my code however, it loads the first file and assigns it to variable ans. Any help is appreciated.
function [cntREF, sREFn, w] = LoadClassData
%%%%Loads the preset data created by the training algorithm
if exist('B', 'var') == 1
return;
else
load('B.mat');
end
if exist('cntREF', 'var') == 1
return;
else
load('cntREF.mat');
end
if exist('sREFn', 'var') == 1
return;
else
load('sREFn.mat');
end
if exist('w', 'var') == 1
return;
else
load('w.mat');
end
end
采纳的回答
Jan
2017-2-24
Each function has its own WorkSpace. Because your function does not have any input, there are no variables defined at the beginning:
function [cntREF, sREFn, w] = LoadClassData
if exist('B', 'var') == 1
% Cannot happen under any circumstances
end
Now you can load the MAT file to the variable B, but it is not provided as output and therefore it does not appear in the caller. The is the meaning of functions: hide everything, what happens internally except for inputs and outputs.
更多回答（1 个）
kowshik Thopalli
2017-2-24
1 个投票
In the else condition- write b=load('b.mat'), w=load('w.mat') etc. Does this solve your problem?
2 个评论
Richard Prince
2017-2-24
kowshik Thopalli
2017-2-24
Yes You are right. It becomes a structure.You have to then access using b.b; Yes. Functions have their own work space which is different from base workspace . Return the loaded matfiles to the script that calls this function.
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