Re: function definition for integration

[Paul Kienzle]

Or you can include the value of the fixed parameters
directly in your wrapper function:

        function x=flotest1(a), x=flotest(a,4); end

You can use inline() from octave-forge as a shorthand for this:

        octave:4> quad(inline('flotest(x,4)'),0,1)
        ans = 4.3333

Paul Kienzle
address@hidden

On Mar 21, 2004, at 10:53 PM, address@hidden wrote:

> Flo:
>
> A simple if inelegant way to pass multivariate functions when only a
> univariate function is expected is to use global variables and a 
> wrapper
> function.
>
> That is, if your integrand function is
>
>         function x = flotest (a, b) x = a^2 + b; endfunction
>
> then write a wrapper:
>
>         function x = flotest1 (a)
>          global flotest_b
>          x = flotest (a, flotest_b);
>         endfunction
>
> define the global variable
>
>         octave> global flotest_b
>         octave> flotest_b = 4;
>
> and do the integration:
>         
>         octave> quad ("flotest1", 0, 1);
>         4.3333
>
>
>
> On Fri, 19 Mar 2004 08:23 pm, address@hidden wrote:
> > Hi,
> > Am am using 2.1.40 since 1 week, like it so a far a lot, and would 
> > like to
> > integrate a function, defined as with
> > two variables, whereas I pass on one as number - so as a simple
> > example s.th. like this, which doesn't do the trick:
> >
> > function x=test(a,b)
> > x= a^2 + b;
> > endfunction
> > quad('test(a,4)',0,1)
> >
> > So how can I pass on variables not values on to a
> > defined function ? I
> > dont try to do anything symbolic. I looked around a good bit in the
> > documentation, but couldn't figure it out.
> >
> > Any hints are appreciated,
> > Thanks a lot,
> > Flo
> >
> >
> >
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