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third order derivative for external functions

PostPosted: Sat Dec 26, 2015 5:06 am
by ghazika1
Hi,

I want to use an external function in my model block, and I want to use third order perturbation. I declare the function using:
external_function(name = funcname, nargs = 3, first_deriv_provided, second_deriv_provided);

It works fine with order=2, but when I use order=3, I get the error:
ERROR: third order derivatives of external functions are not implemented

Is there a way that I can implement the third order derivative of the external function?

Thank you,
Ghazika1

Re: third order derivative for external functions

PostPosted: Sat Dec 26, 2015 10:15 am
by jpfeifer

Re: third order derivative for external functions

PostPosted: Sat Dec 26, 2015 7:19 pm
by ghazika1
Thank you jpfeifer.