www.neuron.yale.edu

Hi,

I was wondering whether it is possible to declare a matrix in NMODL, without having to use VERBATIM blocks. I tried to use the same syntax as for arrays, but the compilation failed.

Thank you for your help,
Daniele

I'm afraid nmodl does not support multidimensional arrays. You have to map it into a fixed size 1-d array.
That is often unacceptable and so many mod files use VERBATIM to wrap hoc Vector using
extern int vector_capacity(Vect*);
extern void vector_resize(Vect*, int);
extern double* vector_vec(Vect*);
extern Vect* vector_arg(int);
extern bool is_vector_arg(int);
See nrn/src/nrnoc/pattern.mod or (simpler) nrn/share/examples/nrniv/netcon/vecevent.mod for examples.