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Creating an inline-function in dependence of a parameter

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I want to use the newtzero-function which is not able to handle functions with parameters, so I thougth about writing a method which returns an inline function depending on a parameter, for example: fun_gen (5) should return inline('5*x^2').
Any guess?

Answers (3)

Jonas Reber
Jonas Reber on 31 May 2011
maybe str2func is what you are looking for?

Oleg Komarov
Oleg Komarov on 31 May 2011
c = 5;
f1 = inline([sprintf('%d',c) '*x^2'])
f2 = str2func(['@(x)' sprintf('%d',c) '*x^2'])
isequal(f1(2),f2(2)) % ok

Walter Roberson
Walter Roberson on 31 May 2011
You can do it with anonymous functions instead of inline:
fun_gen = @(c) @(x) c*x^2;
Note that if you do this, then any one generated function will show c when it is displayed instead of the "captured" value of c, but it does work properly.

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