Function with variable number of input arguments

2014 7 24
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更新时间：2014 7 24
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Hey everyone,
I created a function called matrixmultiply, and I'm trying to define it for 2, 3, and 4 input arguments. How do I do this in one single script? I've heard "varargin" and "nargin" variables could work, but I don't know how to use those.
(I've defined it separately for 4 arguments already.)
Thanks!

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Azzi Abdelmalek
Azzi Abdelmalek 2014-7-24

7 个投票

In your case you can just use nargin to know the number of inputs. Look at this example
function y=fcn10(a,b,c,d)
if nargin==2
y=a+b
elseif nargin==3
y=a*b*c
elseif nargin==4
y=(a+b)*(c+d)
end

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Sid jayadev
Sid jayadev 2014-7-24
ah ok great! thanks! I have a complete if..elseif..elseif...end loop for 4 arguments, so do i need to create separate if statements for 3 and 2 arguments, or can i simply continue nargin = 3 and margin in the original if statement for 4 variables?

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