void backwardelimination(uint nvariables,uint nsamples, dmatrix x, dvector w, dvector y){
bool finished = false;
uint leastinterestingmodel;
double logLfull = likelihoodbyem(nvariables,nsamples,x,w,y);
bvector model = newbvector(nvariables);
double dropneeded = 2*inverseF(2,nsamples-nvariables,0.005);
cout << "Likelihood of the full model: " << logLfull << endl;
while((!finished) && modelsize(nvariables,model) > 1){
cout << "modelsize(model) = " << modelsize(nvariables,model) << "Drop " << dropneeded <<endl;
dvector logL = newdvector(modelsize(nvariables,model));
for(uint todrop=0;todrop<modelsize(nvariables,model);todrop++){
bvector tempmodel = newbvector(nvariables);
copybvector(nvariables,model,tempmodel);
dropterm(nvariables,tempmodel,todrop);
dmatrix designmatrix = createdesignmatrix(nvariables,nsamples,x,tempmodel);
logL[todrop] = likelihoodbyem(modelsize(nvariables,tempmodel),nsamples,designmatrix,w,y);
freematrix((void**)designmatrix,nsamples);
freevector((void*)tempmodel);
}
leastinterestingmodel = lowestindex(modelsize(nvariables,model),logL);
cout << "Least interesting model:" << leastinterestingmodel << " Difference to fullmodel:" << (logLfull - logL[leastinterestingmodel]) << endl;
if(dropneeded > fabs(logLfull - logL[leastinterestingmodel])){
dropterm(nvariables,model,leastinterestingmodel);
logLfull = logL[leastinterestingmodel];
cout << "Drop variable" << leastinterestingmodel << endl;
cout << "Likelihood of the new full model: " << logLfull<< endl;
}else{
for(uint x=0;x<nvariables;x++){
if(model[x]) cout << "Variable" << x << "In Model" << endl;
}
finished=true;
}
}
}
PRIVATE void compile_main(FILE *conni, FILE *conno) {
REPL_DATA rd = allocmem(sizeof(repl_data));
VMstate vms;
rd->h1 = rd->h2 = NULL;
protect(&rd->h1);
protect(&rd->h2);
rd->vmregs = (VMREGS) newvector(NUM_VMREGS); /* dodgy casting :-) */
vms.r = rd->vmregs;
protect((OBJ *)(&rd->vmregs));
init_vm(&vms);
vms.c.vm_state = VM_STATE_NOQUOTA;
while (vms.c.vm_state != VM_STATE_DYING) {
ScanInst si;
char buf[16384];
rd->h1 = (OBJ) newbvector(0);
while (1) {
char *result;
result = fgets(buf, 256, conni);
if (result == NULL)
break;
while (1) {
int l = strlen(buf);
if (buf[l-1] == '\r' || buf[l-1] == '\n')
buf[l-1] = '\0';
else
break;
}
strcat(buf, "\n");
if (!strcmp(buf, ".\n"))
break;
rd->h2 = (OBJ) newstring(buf);
rd->h1 = (OBJ) bvector_concat((BVECTOR) rd->h1, (BVECTOR) rd->h2);
}
gc_reach_safepoint();
rd->h2 = (OBJ) newstringconn((BVECTOR) rd->h1);
fill_scaninst(&si, (OVECTOR) rd->h2);
while (!conn_closed((OVECTOR) rd->h2)) {
rd->h1 = (OBJ) parse(&vms, &si);
gc_reach_safepoint();
if (rd->h1 == NULL) {
sprintf(buf, "-->! the compiler returned NULL.\n");
} else {
vms.c.vm_state = VM_STATE_NOQUOTA;
ATPUT((OVECTOR) rd->h1, ME_OWNER, (OBJ) vms.r->vm_uid);
vms.r->vm_effuid = vms.r->vm_uid;
{
OVECTOR c = newovector_noinit(CL_MAXSLOTINDEX, T_CLOSURE);
ATPUT(c, CL_SELF, NULL);
ATPUT(c, CL_METHOD, rd->h1);
rd->h1 = (OBJ) c;
}
apply_closure(&vms, (OVECTOR) rd->h1, newvector_noinit(1));
while (!run_vm(&vms)) ;
rd->h1 = (OBJ) newvector(2);
ATPUT((VECTOR) rd->h1, 0, NULL);
ATPUT((VECTOR) rd->h1, 1, vms.r->vm_acc);
rd->h1 = lookup_prim(0x00001, NULL)(&vms, (VECTOR) rd->h1);
rd->h1 = (OBJ) bvector_concat((BVECTOR) rd->h1, newbvector(1));
/* terminates C-string */
gc_reach_safepoint();
sprintf(buf, "--> %s\n", ((BVECTOR) rd->h1)->vec);
}
fputs(buf, conno);
}
}
unprotect((OBJ *)(&rd->vmregs));
unprotect(&rd->h2);
unprotect(&rd->h1);
freemem(rd);
}
