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/*
* Copyright (c) 1996-2001 Lucent Technologies.
* See README file for details.
*/
#include "local.h"
/*
preplot(): interpolates the fit to a new set of points.
lf -- the fit structure.
des -- design structure; really only needed for parfit.
x -- the points to predict at.
f -- vector to return the predictions.
se -- vector to return std errors (NULL if not req'd)
band-- char for conf band type. ('n'=none, 'g'=global etc.)
n -- no of predictions (or vector of margin lengths for grid)
where -- where to predict:
1 = points in the array x.
2 = grid defined by margins in x.
3 = data points from lf (ignore x).
4 = fit points from lf (ignore x).
what -- what to predict.
(PCOEF etc; see lfcons.h file)
cpreplot(): C version front end.
setpppoints(): (C version) used to set preplot points.
*/
static char cb;
double *sef, *fit, sigmahat;
void predptall(lf,des,x,what,ev,i)
lfit *lf;
design *des;
double *x;
INT what, ev, i;
{ double lik, rdf;
fit[i] = dointpoint(lf,des,x,what,ev,i);
if (cb=='n') return;
sef[i] = dointpoint(lf,des,x,PNLX,ev,i);
if (cb=='g')
{ sef[i] *= sigmahat;
return;
}
if (cb=='l')
{ lik = dointpoint(lf,des,x,PLIK,ev,i);
rdf = dointpoint(lf,des,x,PRDF,ev,i);
sef[i] *= sqrt(-2*lik/rdf);
return;
}
if (cb=='p')
{ sef[i] = sigmahat*sqrt(1+sef[i]*sef[i]);
return;
}
}
void prepvector(lf,des,x,n,what) /* interpolate a vector */
lfit *lf;
design *des;
double **x;
INT n, what;
{ INT i, j;
double xx[MXDIM];
for (i=0; i<n; i++)
{ for (j=0; j<lf->mi[MDIM]; j++) xx[j] = x[j][i];
predptall(lf,des,xx,what,lf->mi[MEV],i);
if (lf_error) return;
}
}
void prepfitp(lf,des,what)
lfit *lf;
design *des;
INT what;
{
INT i;
//d = lf->mi[MDIM];
for (i=0; i<lf->nv; i++)
{ predptall(lf,des,evpt(lf,i),what,EFITP,i);
if (lf_error) return;
}
}
void prepgrid(lf,des,x,mg,n,what) /* interpolate a grid given margins */
design *des;
lfit *lf;
double **x;
INT *mg, n, what;
{ INT i, ii, j, d;
double xv[MXDIM];
d = lf->mi[MDIM];
for (i=0; i<n; i++)
{ ii = i;
for (j=0; j<d; j++)
{ xv[j] = x[j][ii%mg[j]];
ii /= mg[j];
}
predptall(lf,des,xv,what,lf->mi[MEV],i);
if (lf_error) return;
}
}
void preplot(lf,des,x,f,se,band,mg,where,what)
lfit *lf;
design *des;
double **x, *f, *se;
INT *mg, where, what;
char band;
{ INT d = 0, i, n;
double *xx[MXDIM];
d = lf->mi[MDIM];
fit = f;
sef = se;
cb = band;
if (cb!='n') sigmahat = sqrt(lf->dp[DRV]);
switch(where)
{ case 1: /* vector */
n = mg[0];
prepvector(lf,des,x,n,what);
break;
case 2: /* grid */
n = 1;
for (i=0; i<d; i++) n *= mg[i];
prepgrid(lf,des,x,mg,n,what);
break;
case 3: /* data */
n = lf->mi[MN];
if ((lf->mi[MEV]==EDATA) | (lf->mi[MEV]==ECROS))
prepfitp(lf,des,what);
else
{ for (i=0; i<d; i++) xx[i] = dvari(lf,i);
prepvector(lf,des,xx,n,what);
}
break;
case 4: /* fit points */
n = lf->nv;
prepfitp(lf,des,what);
break;
default:
ERROR(("unknown where in preplot"));
return;
}
if ((what==PT0)|(what==PVARI))
for (i=0; i<n; i++) f[i] = f[i]*f[i];
}
#ifdef CVERSION
extern lfit lf;
extern design des;
void cpreplot(pp,vc,band)
pplot *pp;
vari *vc;
char band;
{ double *data[MXDIM];
INT j, mg[MXDIM];
for (j=0; j<pp->d; j++)
{ data[j] = vdptr(pp->data[j]);
mg[j] = pp->data[j]->n;
}
j = getarg(vc,"what",0);
pp->wh = (j>0) ? ppwhat(argval(vc,j)) : PCOEF;
preplot(&lf,&des,data,vdptr(pp->fit),vdptr(pp->se),band,mg,pp->gr,pp->wh);
}
INT setpppoints(pp,where,mg,xl)
pplot *pp;
char *where;
INT *mg;
double *xl;
{ INT d, i, j, n, m;
varname vn;
d = pp->d = lf.mi[MDIM];
if (strcmp(where,"fitp")==0)
{ n = lf.nv;
for (j=0; j<d; j++)
{ sprintf(vn,"_pred%d",j);
pp->data[j] = createvar(vn,STPLOTVAR,n,VDOUBLE);
if (lf_error) return(0);
for (i=0; i<n; i++)
vassn(pp->data[j],i,evptx(&lf,i,j));
}
pp->gr = 4;
return(n);
}
if (strcmp(where,"data")==0)
{ recondat(1,&n);
for (j=0; j<d; j++)
{ sprintf(vn,"_pred%d",j);
pp->data[j] = createvar(vn,STPLOTVAR,n,VDOUBLE);
if (lf_error) return(0);
for (i=0; i<n; i++)
vassn(pp->data[j],i,datum(&lf,j,i));
}
pp->gr = 3;
return(n);
}
if (strcmp(where,"grid")==0)
{ n = 1;
for (j=0; j<d; j++)
{ sprintf(vn,"_pred%d",j);
m = (mg==NULL) ? 40 : mg[j];
pp->data[j] = createvar(vn,STPLOTVAR,m,VDOUBLE);
if (lf_error) return(0);
if (m==1)
vassn(pp->data[j],0,(xl[d+j]+xl[j])/2);
else
for (i=0; i<m; i++)
vassn(pp->data[j],i,xl[j]+i*(xl[d+j]-xl[j])/(m-1));
n *= m;
pp->gr = 2;
}
return(n);
}
ERROR(("setpppoints: invalid where=%s",where));
return(0);
}
#endif
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