MATLAB nesting multiple input functions

Question

Given a multiple-input MATLAB function

out=f(in1, in2)

I would like to write a second function g which generates the inputs for f, e.g.

[in1, in2]=g(in)

so that I can call something like:

out=f(g(in))

I have tried writing g as a single output function that stores in1 and in2 in a cell array so that I can feed the output of g to f using the colon operator:

in_c=g(in);
out=f(in_c{:})

but I was looking for a one-line solution, which seems not possible to achieve this way as I read in this Stack Overflow question

Is there any other way to do this?

This is not possible in Matlab. The best you could do is to have `f` take a cell array as input, and `g` return a cell array as output. — Chris Taylor, Jul 16 '12 at 12:53
possible duplicate of [Matlab --- splice vector into arguments for function call](http://stackoverflow.com/questions/11461963/matlab-splice-vector-into-arguments-for-function-call) — Jonas, Jul 16 '12 at 13:01

score 0 · Accepted Answer · edited May 23 '17 at 12:18

0

As discussed recently, this is not possible in Matlab.

However, if you do not want to re-write your function g(x,y) to return a cell array, you can still do everything in two lines:

[in4f{1}, in4f{2}] = g(in);
out = f(in4f{:});

As an aside: Unless you're really hurting for memory, it doesn't make a lot of sense to try and force one-line statements everywhere by avoiding temporary variables. Sure, you can make your code look like CrazyPerl, but in the long run, you'll be glad for the added readability.

edited May 23 '17 at 12:18

Community

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answered Jul 16 '12 at 13:06

Jonas

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Generally you don't save on memory either as the temporaries are still created implicitly. – tmpearce Jul 16 '12 at 13:53

MATLAB nesting multiple input functions

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