Re: using a function name as a function argument?

Will:


Attached is an *untested* Newton-Rapson f77 code that could be called as a
shared object.


Cheers


On Wed, Jun 11, 2014 at 9:52 AM, Rick Brownrigg <brownrig@ucar.edu> wrote:

> Hi Will,
>
> Maybe someone else can chime in here, but I tried a quick experiment to
> define a function and pass it to a second function to be called, and it
> looks like this is not possible.
>
> Rick
>
>
> On Tue, Jun 10, 2014 at 10:24 PM, Will Hobbs <Will.Hobbs@utas.edu.au>
> wrote:
>
>> NCL'ers
>>
>> I need to write a function that uses the Newton-Raphson iterative
>> method to solve a mathematical function,
>>
>> e.g. find x for which f(x) = 0, which is solved iteratively by the
>> Newton Raphson method thus
>>
>> do while (dx.le.del) ;where 'del' is some acceptable level of
>> convergence e.g. 0.01
>>
>> x1 = x0 + f(x0)/ f'(x0)
>>
>> dx = (x1-x0)^2/x0^2
>>
>> x0 = x1
>>
>> end do
>>
>>
>> Is it possible to define a function with arguments that call other
>> functions, i.e.
>>
>> function Newt-Rap(f, fdash, x0)
>>
>> If not, is there another way of writing a generic subroutine that can
>> reference other functions?
>>
>> Will
>>
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>
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Received on Wed Jun 11 04:03:15 2014