I have a function that returns three values [A,B,C]=ABC(x).
Is it possible to define a function A(x) in an elegant way such that returns the first value of ABC(x), B(x) for the second value, etc.?
Thanks
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3 Answers
Not completely clear whether you really mean that ABC returns a vector, or that it returns three values (each of which might be any object). If you really mean "vector" with three elements, [A B C]. then you could do:
function a = A(x)
temp = ABC(x);
a = temp(1);
Comments
As you wrote your function ([A,B,C]=ABC(x)) it does not return a vector per say, it returns 3 values.
If you call your function like this
a = ABC(x)
a would be equal to A.
EDIT :
function b = B(x)
[~, b, ~] = ABC(x)
end
4 Comments
foreignvol
You're right but I also would like to obtain the second value. I edited the original post. Thanks.
AdrienNK
You can also do [~, b, ~] = ABC(x) to get the second value. I don't really see why you want to have more functions.
foreignvol
I want to define a second function F=@(y,z) A(x)*y+B(z).
Floris
This is a nice clean solution. It does require a "somewhat recent" version of Matlab -the
~ notation was introduced with R2009. See for example stackoverflow.com/a/747439/1967396You could include a 2nd input argument if it is acceptable to you. You could use varargin to accept variable number of input arguments.
function outValue=ABC(varargin);
if nargin==0
error('Need at least one argument');
elseif nargin==1
%obtain result
outValue=result;
elseif nargin==2
%obtain result
outValue=result(index);
else
error('Function accepts maximum of 2 arguments');
end
end
