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

[Matei Stroila]

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