How to split an array as argument values in matlab?

Question

In my matlab script, I have a function handler

F=@(x1,x2)6+2*x1^1+3*x2^2;

This gives me an anonymous function as F that takes 2 arguments and returns the value. I also have an array of values

x = [1 2];

With the above, how can I do

F(x)

In other words, something like F(1, 2) but I want to use x, I don't want to hard code values, and it also needs to work for any dimension size, I don't want to hard code it for 2-dimension like in the above example. Basically what I'm looking for is a way to turn an array into arguments.

Can this be done in matlab?

Thanks

+1 for the great, concise wording: "turn an array into arguments" — Luis Mendo
– Luis Mendo, Commented Mar 6, 2014 at 19:53

Luis Mendo · Accepted Answer · 2014-03-06 19:51:07Z

2

To turn an array into its arguments: first turn the array into a cell array (with num2cell), and then turn the cell array into a comma-separated list (with {:}):

xcell = num2cell(x);
F(xcell{:})

answered Mar 6, 2014 at 19:51

Luis Mendo

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2 Comments

omega Over a year ago

I have another issue: stackoverflow.com/questions/22234949/…

chappjc Over a year ago

@omega It's a clever answer. Don't forget to upvote.

jerad · Accepted Answer · 2014-03-06 19:46:32Z

0

Does this work?

F=@(x)6+2*x(1)^1+3*x(2)^2;
xx = [1 2];
F(xx)
ans =

    20

answered Mar 6, 2014 at 19:46

jerad

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