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: Vector stream of events
COMMENT
A VecStim is an artificial spiking cell that generates
events at times that are specified in a Vector.
HOC Example:
// assumes spt is a Vector whose elements are all > 0
// and are sorted in monotonically increasing order
objref vs
vs = new VecStim()
vs.play(spt)
// now launch a simulation, and vs will produce spike events
// at the times contained in spt
Python Example:
from neuron import h
spt = h.Vector(10).indgen(1, 0.2)
vs = h.VecStim()
vs.play(spt)
def pr():
print (h.t)
nc = h.NetCon(vs, None)
nc.record(pr)
cvode = h.CVode()
h.finitialize()
cvode.solve(20)
ENDCOMMENT
NEURON {
THREADSAFE
ARTIFICIAL_CELL VecStim
BBCOREPOINTER ptr
}
ASSIGNED {
index
etime (ms)
ptr
}
INITIAL {
index = 0
element()
if (index > 0) {
net_send(etime - t, 1)
}
}
NET_RECEIVE (w) {
if (flag == 1) {
net_event(t)
element()
if (index > 0) {
net_send(etime - t, 1)
}
}
}
DESTRUCTOR {
VERBATIM
#if !NRNBBCORE
void* vv = (void*)(_p_ptr);
if (vv) {
hoc_obj_unref(*vector_pobj(vv));
}
#endif
ENDVERBATIM
}
PROCEDURE element() {
VERBATIM
{ void* vv; int i, size; double* px;
i = (int)index;
if (i >= 0) {
vv = (void*)(_p_ptr);
if (vv) {
size = vector_capacity(vv);
px = vector_vec(vv);
if (i < size) {
etime = px[i];
index += 1.;
}else{
index = -1.;
}
}else{
index = -1.;
}
}
}
ENDVERBATIM
}
PROCEDURE play() {
VERBATIM
#if !NRNBBCORE
{
void** pv;
void* ptmp = NULL;
if (ifarg(1)) {
ptmp = vector_arg(1);
hoc_obj_ref(*vector_pobj(ptmp));
}
pv = (void**)(&_p_ptr);
if (*pv) {
hoc_obj_unref(*vector_pobj(*pv));
}
*pv = ptmp;
}
#endif
ENDVERBATIM
}
VERBATIM
static void bbcore_write(double* xarray, int* iarray, int* xoffset, int* ioffset, _threadargsproto_) {
int i, dsize, *ia;
double *xa, *dv;
dsize = 0;
if (_p_ptr) {
dsize = vector_capacity(_p_ptr);
}
if (iarray) {
void* vec = _p_ptr;
ia = iarray + *ioffset;
xa = xarray + *xoffset;
ia[0] = dsize;
if (dsize) {
dv = vector_vec(vec);
for (i = 0; i < dsize; ++i) {
xa[i] = dv[i];
}
}
}
*ioffset += 1;
*xoffset += dsize;
}
static void bbcore_read(double* xarray, int* iarray, int* xoffset, int* ioffset, _threadargsproto_) {
int dsize, i, *ia;
double *xa, *dv;
xa = xarray + *xoffset;
ia = iarray + *ioffset;
dsize = ia[0];
if (!_p_ptr) {
_p_ptr = vector_new1(dsize);
}
assert(dsize == vector_capacity(_p_ptr));
dv = vector_vec(_p_ptr);
for (i = 0; i < dsize; ++i) {
dv[i] = xa[i];
}
*xoffset += dsize;
*ioffset += 1;
}
ENDVERBATIM
|
