[GiNaC-list] how to use ginac output in gsl at runtime

Matei Stroila stroila2 at uiuc.edu
Sun Nov 21 01:03:03 CET 2004

I figured it out. I just use expression substitution and numeric 
evaluation, I do not use "csrc_double" to a string.


Matei Stroila wrote:

> Hello,
> Here is what I would like to do and I need a piece of advice on this.  
> I want to use ginac to compute the gradient of a function so that I 
> can use this gradient for the conjugate gradient method in gsl (the 
> GNU scientific library).  I succesfully computed the gradient and I 
> can output its expression with "csrc_double" to a string. How can I 
> use this expression in the definiton of a function at runtime?
> I guess other people had this problem too, to use a CAS library in 
> conjuction with a numeric library, at runtime.
> Thanks a lot for any suggestion,
> Matei
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