https://github.com/cran/gstat
Tip revision: 1b2742a3d71abc7fbde73ca141b23e1375f185bf authored by Edzer Pebesma on 30 October 2011, 00:00:00 UTC
version 1.0-9
version 1.0-9
Tip revision: 1b2742a
msim.c
/*
Gstat, a program for geostatistical modelling, prediction and simulation
Copyright 1992, 2011 (C) Edzer Pebesma
Edzer Pebesma, edzer.pebesma@uni-muenster.de
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version. As a special exception, linking
this program with the Qt library is permitted.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
(read also the files COPYING and Copyright)
*/
/*
* msim.c: multiple simulation database + output
* Written during my Post Doc at UvA, end of 1996.
* Rewrite started on Sat Apr 10 20:54:05 WET DST 1999
*/
#include <stdio.h>
#include <stdlib.h> /* qsort() */
#include <string.h> /* memmove() */
#include <math.h> /* sqrt(), ... */
#include "defs.h"
#ifdef USING_R
# include <R.h>
#endif
#include "debug.h"
#include "random.h"
#include "data.h"
#include "utils.h"
#include "vario.h"
#include "glvars.h" /* gl_nsim, gl_format */
#include "predict.h" /* n_pred_locs */
#include "userio.h"
#include "mapio.h"
#include "lm.h"
#include "gls.h"
#include "sim.h"
#include "msim.h"
static DPOINT *which_point(DATA *d, DPOINT *where);
static void restore_data_list(DATA **data, int sim, int n_vars);
static void lhs_one(Double_index *list, unsigned int dim, double mean, double var);
#ifdef SIM_DOUBLE
typedef double Float; /* doubles the memory requirement -> may be pretty much */
#else
typedef float Float;
#endif
static Float
***msim = NULL,
/*
* The msim table entry for variable i, for simulation node j,
* replicate k is msim[i][j][k]
*/
**msim_base = NULL; /* base structure for blocked allocation */
static double
***beta = NULL;
/*
* the beta realisation for variable i, draw j is in
* beta[i][j] -- and has dimension data[i]->beta->size
*/
static unsigned int
*n_sim_locs = NULL, /* n simulation locations per data variable */
table_size = 0, /* offset strata table size */
**s2d = NULL,
/*
* s2d: <data list entries> -- find (POINT *) from msim:
* msim[i][j][...] -->> data[i]->list[s2d[i][j]]
*/
**d2s = NULL;
/*
* d2s: <msim entries> find msim entry from (POINT *):
* data[i]->list[j] -->> msim[i][d2s[i][j]][...]
* ((the latter two are necessary because simple counting fails
* when point simulation locations coincide with data locations. In
* this case, a data DPOINT is not added to the data list, and so we
* need to keep track _where_ simulated values were located in order
* to write them back to output (file/maps) at the end))
*/
void print_sim(void) {
/* print complete contents of sim_values -- for debug purposes only */
int i, j, k;
for (i = 0; i < get_n_vars(); i++) {
printlog("variable %d:\n", i);
for (j = 0; j < n_sim_locs[i]; j++) {
for (k = 0; k < gl_nsim; k++)
printlog(" %g", msim[i][j][k]);
printlog("\n");
}
}
}
void init_simulations(DATA **d) {
int i, j, size;
assert(n_pred_locs > 0); /* should be set by now... */
if (msim != NULL)
free_simulations();
n_sim_locs = get_n_sim_locs_table(&table_size);
if (DEBUG_DUMP) {
printlog("n_sim_locs_table: ");
for (i = 0; i < table_size; i++)
printlog("[%d] ", n_sim_locs[i]);
printf("\n");
}
msim = (Float ***) emalloc(get_n_vars() * sizeof(Float **));
msim_base = (Float **) emalloc(get_n_vars() * sizeof(Float *));
s2d = (unsigned int **) emalloc(get_n_vars() * sizeof(unsigned int *));
d2s = (unsigned int **) emalloc(get_n_vars() * sizeof(unsigned int *));
for (i = 0; i < get_n_vars(); i++) {
/* msim stuff: */
size = n_sim_locs[i] * gl_nsim;
msim_base[i] = (Float *) emalloc(size * sizeof(Float));
memset(msim_base[i], 0xFF, size * sizeof(Float));
msim[i] = (Float **) emalloc(n_sim_locs[i] * sizeof(Float *));
for (j = 0; j < n_sim_locs[i]; j++)
msim[i][j] = &(msim_base[i][j * gl_nsim]);
/* index stuff: */
s2d[i] = (unsigned int *) emalloc(n_sim_locs[i] * sizeof(unsigned int));
d2s[i] = (unsigned int *) emalloc(n_sim_locs[i] * sizeof(unsigned int));
/* now let's trigger some Seg Faults if on error: */
memset(s2d[i], 0xFF, n_sim_locs[i] * sizeof(unsigned int));
memset(d2s[i], 0xFF, n_sim_locs[i] * sizeof(unsigned int));
}
}
void save_sim(DATA **data, DPOINT *where, int sim, int n_vars,
const double *value, int *is_pt) {
/*
* save the last simulated value(s) in msim;
* data[0]->n_list and data[0]->n_original (mode != STRATIFY) or
* else n_vars (..) denote where it should go.
*/
int i, row;
DPOINT *which = NULL;
if (gl_nsim <= 1)
return;
for (i = 0; i < n_vars; i++) { /* store current simulation */
row = data[i]->n_list - data[i]->n_original + data[i]->nsim_at_data;
if (sim == 0) { /* fill d2s and s2d entries: */
assert(row >= 0 && row < n_sim_locs[i]);
if (is_pt[i]) {
which = which_point(data[i], where);
s2d[i][row] = GET_INDEX(which);
/* d2s remains MV */
} else { /* newly simulated */
s2d[i][row] = data[i]->n_list;
d2s[i][data[i]->n_list - data[i]->n_original] = row;
/* please go and check it -- this last line took me
4 hours to get right */
}
}
msim[i][row][sim] = value[i];
}
}
void save_sim_strat(DATA *d, DPOINT *where, int sim, double value, int is_pt) {
/* the same, but for stratified mode */
int row;
DPOINT *which = NULL;
if (gl_nsim <= 1)
return;
row = d->n_list - d->n_original + d->nsim_at_data;
if (sim == 0) { /* fill d2s and s2d entries: */
assert(row >= 0 && row < n_sim_locs[d->id]);
if (is_pt) {
which = which_point(d, where);
s2d[d->id][row] = GET_INDEX(which);
/* the entry for d2s does not exist */
} else { /* not an original point, but a simulated one: */
s2d[d->id][row] = d->n_list; /* newly simulated */
d2s[d->id][d->n_list - d->n_original] = row;
}
}
msim[d->id][row][sim] = value;
}
static DPOINT *which_point(DATA *d, DPOINT *where) {
int i;
double dzero2;
#define WPWARNING "if you are simulating with a Gaussian variogram model without nugget\n\
then try to add a small nugget variance to avoid the following error message"
dzero2 = gl_zero * gl_zero;
for (i = 0; i < d->n_sel; i++)
if (fabs(d->pp_norm2(d->sel[i], where)) <= dzero2)
return d->sel[i];
pr_warning(WPWARNING);
ErrMsg(ER_NULL, "which_point(): point not found");
return where; /* never reached */
}
void restore_data_sel(DATA **data, int sim, int n_vars) {
unsigned int i, j;
int id, idx;
DATA *d0 = NULL;
if (gl_nsim <= 1)
return;
if (n_vars == 0) {
assert(get_mode() == STRATIFY);
d0 = data[0];
for (j = 0; j < d0->n_sel; j++) {
id = d0->id;
idx = GET_INDEX(d0->sel[j]) - d0->n_original;
/* current sim: */
if (idx >= 0 && d2s[id][idx] != 0xFFFFFFFF)
d0->sel[j]->attr = msim[id][d2s[id][idx]][sim];
}
} else {
for (i = 0; i < n_vars; i++) {
for (j = 0; j < data[i]->n_sel; j++) {
idx = GET_INDEX(data[i]->sel[j]) - data[i]->n_original;
/* idx < 0 -->> original data, don't restore */
if (idx >= 0 && d2s[i][idx] != 0xFFFFFFFF)
data[i]->sel[j]->attr = msim[i][d2s[i][idx]][sim];
/* data[i]->list[j] -->> msim[i][d2s[i][j]][...] */
}
}
}
}
static void restore_data_list(DATA **data, int sim, int n_vars) {
/*
* for data[0]..data[n_vars-1] restore the values of the `sim' simulation
* back into the attribute values
*/
int i, j, id, idx;
DATA *d0;
assert(gl_nsim > 1);
if (get_mode() == STRATIFY) {
/*
* n_vars is in this case n_pred_locs, so the loop is over all locations:
*/
d0 = data[0];
for (j = d0->n_original; j < d0->n_list; j++) {
id = d0->id;
idx = j - d0->n_original;
if (d2s[id][idx] != 0xFFFFFFFF)
d0->list[j]->attr = msim[id][d2s[id][idx]][sim];
}
} else {
for (i = 0; i < n_vars; i++)
for (j = data[i]->n_original; j < data[i]->n_list; j++) {
idx = j - data[i]->n_original;
if (d2s[i][idx] != 0xFFFFFFFF)
data[i]->list[j]->attr = msim[i][d2s[i][idx]][sim];
}
}
}
#ifndef USING_R
void save_simulations_to_ascii(const char *fname) {
DATA **d, *dv;
FILE *f;
int i, j, k, n_vars, n_cols = 0;
if (msim == NULL || gl_nsim <= 1)
return;
#ifdef DEBUGSIM
print_sim();
#endif
f = efopen(fname, "w");
d = get_gstat_data();
dv = get_dataval();
n_vars = get_n_vars();
if (d[0]->mode & X_BIT_SET) n_cols++;
if (d[0]->mode & Y_BIT_SET) n_cols++;
if (d[0]->mode & Z_BIT_SET) n_cols++;
if (get_mode() == STRATIFY)
n_cols += (1 + gl_nsim);
else
n_cols += n_vars * gl_nsim;
if (dv->type.type == DATA_EAS) {
fprintf(f, "#%s simulation results (seed %lu)\n%d\n",
get_mode() == STRATIFY ? "stratified" : "multiple", get_seed(), n_cols);
if (dv->mode & X_BIT_SET) fprintf(f, "%s\n", NULS(dv->x_coord));
if (dv->mode & Y_BIT_SET) fprintf(f, "%s\n", NULS(dv->y_coord));
if (dv->mode & Z_BIT_SET) fprintf(f, "%s\n", NULS(dv->z_coord));
if (get_mode() == STRATIFY)
fprintf(f, "stratum\n");
}
if (get_mode() != STRATIFY) {
for (i = 0; dv->type.type == DATA_EAS && i < n_vars; i++) /* header */
for (j = 0; j < gl_nsim; j++)
fprintf(f, "%s--sim#%d\n", name_identifier(i), j);
for (i = 0; i < n_sim_locs[0]; i++) {
if (d[0]->mode & X_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[0]->list[s2d[0][i]]->x);
}
if (d[0]->mode & Y_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[0]->list[s2d[0][i]]->y);
}
if (d[0]->mode & Z_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[0]->list[s2d[0][i]]->z);
}
for (j = 0; j < n_vars; j++) {
for (k = 0; k < gl_nsim; k++) {
fprintf(f, " ");
fprintf(f, gl_format, msim[j][i][k]);
}
}
fprintf(f, "\n");
}
} else { /* STRATIFIED */
for (j = 0; dv->type.type == DATA_EAS && j < gl_nsim; j++)
fprintf(f, "stratified sim#%d\n", j);
for (i = 0; i < n_vars; i++) {
for (j = 0; j < n_sim_locs[i]; j++) {
if (d[i]->mode & X_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[i]->list[s2d[i][j]]->x);
}
if (d[i]->mode & Y_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[i]->list[s2d[i][j]]->y);
}
if (d[i]->mode & Z_BIT_SET) {
fprintf(f, " ");
fprintf(f, gl_format, d[i]->list[s2d[i][j]]->z);
}
if (d[i]->mode & S_BIT_SET)
fprintf(f, " %d", d[i]->list[s2d[i][j]]->u.stratum + strata_min);
else
fprintf(f, " %d", d[i]->id + strata_min);
for (k = 0; k < gl_nsim; k++) {
fprintf(f, " ");
fprintf(f, gl_format, msim[i][j][k]);
}
fprintf(f, "\n");
}
}
}
free_simulations();
efclose(f);
}
void save_simulations_to_maps(GRIDMAP *mask) {
unsigned int i, j, k, r, c;
char *name = NULL, *what = NULL;
const char *cp;
DATA **d;
GRIDMAP *m;
void map_sign(GRIDMAP *m, const char *what);
if (msim == NULL || gl_nsim <= 1)
return;
#ifdef DEBUGSIM
print_sim();
#endif
d = get_gstat_data();
/* remove standard output files: they equal the last one ********
for (i = 0; i < get_n_vars(); i++)
if (get_outfile_namei(2 * i) && remove(get_outfile_namei(2 * i)))
pr_warning("could not remove %s", get_outfile_namei(2 * i));
********************/
for (i = 0; i < gl_nsim; i++) {
if (get_mode() != STRATIFY) {
restore_data_list(d, i, get_n_vars());
for (j = 0; j < get_n_vars(); j++) {
if ((cp = get_outfile_namei(2 * j)) != NULL) {
name = (char *) erealloc(name,
(strlen(cp) + 12) * sizeof(char));
map_name_nr(mask, cp, name, i , gl_nsim);
what = (char *) erealloc(what,
(strlen(name_identifier(j)) + 20) * sizeof(char));
sprintf(what, "%s : simulation %d", name_identifier(j), i);
m = map_dup(name, mask);
for (k = 0; k < n_sim_locs[j]; k ++) {
assert(s2d[j][k] < d[j]->n_list);
if (map_xy2rowcol(m,
d[j]->list[s2d[j][k]]->x,
d[j]->list[s2d[j][k]]->y,
&r, &c)) {
pr_warning("x %g y %g",
d[j]->list[s2d[j][k]]->x,
d[j]->list[s2d[j][k]]->y);
ErrMsg(ER_IMPOSVAL, "map_xy2rowcol");
}
map_put_cell(m, r, c, d[j]->list[s2d[j][k]]->attr);
}
map_sign(m, what);
m->write(m);
map_free(m);
}
}
} else { /* stratified; will not occur if n_pred_locs == 0: */
cp = get_outfile_namei(0);
name = (char *) erealloc(name, (strlen(cp) + 12) * sizeof(char));
map_name_nr(mask, cp, name, i , gl_nsim);
what = (char *) erealloc(what, 40 * sizeof(char));
sprintf(what, "stratified simulation %d", i);
m = map_dup(name, mask);
for (j = 0; j < get_n_vars(); j++) {
restore_data_list(&d[j], i, n_pred_locs);
for (k = 0; k < n_sim_locs[j]; k++) {
if (map_xy2rowcol(m,
d[j]->list[s2d[j][k]]->x,
d[j]->list[s2d[j][k]]->y,
&r, &c)) {
pr_warning("x %g y %g",
d[j]->list[s2d[j][k]]->x,
d[j]->list[s2d[j][k]]->y);
ErrMsg(ER_IMPOSVAL, "map_xy2rowcol");
}
map_put_cell(m, r, c, d[j]->list[s2d[j][k]]->attr);
}
}
map_sign(m, what);
m->write(m);
map_free(m);
} /* else */
} /* for i */
efree(name);
efree(what);
free_simulations();
}
#endif
void free_simulations(void) {
int i, j;
if (msim != NULL) {
for (i = 0; i < get_n_vars(); i++) {
efree(msim[i]);
efree(msim_base[i]);
efree(s2d[i]);
efree(d2s[i]);
}
efree(msim);
msim = NULL;
efree(msim_base);
msim_base = NULL;
}
if (s2d != NULL) {
efree(s2d);
s2d = NULL;
}
if (d2s != NULL) {
efree(d2s);
d2s = NULL;
}
if (beta != NULL) {
for (i = 0; i < get_n_vars(); i++) {
for (j = 0; j < gl_nsim; j++)
efree(beta[i][j]);
efree(beta[i]);
}
efree(beta);
beta = NULL;
}
}
#ifndef USING_R
void lhs(DATA **d, int n_vars, int stratify) {
/*
* lhs(): Latin hypercube sampling of multi-Gaussian random fields
* written: Sept 1996
* Dec 1997: added warning for small sample size
*
* given the table sim_values[][], create a Latin Hypercube Sample (LHS),
* assuming that the marginal distribution of each variable is equal to
* the unconditional distribution (N(mu(s_0), sill)) or the marginal distrib.
* as defined by the `marginals' command.
*
* references:
* Stein, M.L. (1987) Large Sample Properties of Simulations
* Using Latin Hypercube Sampling. Technometrics 29 (2): 143-151.
* Pebesma, E.J., and Heuvelink, G.B.M.,
* Latin Hypercube Sampling of Gaussian Random Fields
* (accepted for publication in Technometrics, planned for Nov 1999 issue)
*
* marginal distribution of variable k, 0 <= k <= K:
* if !stratify: get from data[k % n_vars].
* else: get from data[strata[k]].
*/
int i, j, k, map;
unsigned int r, c;
double mean = 0.0, variance = 0.0;
Double_index *row_Y = NULL;
VARIOGRAM *vp = NULL;
GRIDMAP **lhsmean = NULL, **lhsvar = NULL;
char *fname;
if (DEBUG_DUMP || DEBUG_COV)
printlog("\nLatin hypercube sampling...");
if (gl_nsim <= 1) {
if (DEBUG_DUMP || DEBUG_COV)
printlog("\nno data to do so");
return;
}
if (gl_nsim <= 15)
pr_warning("small sample size (%d) may cause disturbed joint distributions", gl_nsim);
if (get_method() != GSI)
pr_warning("lhs(): will produce nonsense if not used for Gaussian simulation");
if (gl_marginal_names) {
lhsmean = (GRIDMAP **) emalloc((gl_n_marginals / 2) * sizeof(GRIDMAP *));
lhsvar = (GRIDMAP **) emalloc((gl_n_marginals / 2) * sizeof(GRIDMAP *));
for (i = 0; i < gl_n_marginals / 2; i++) {
fname = string_dup(gl_marginal_names[i * 2]);
lhsmean[i] = new_map(READ_ONLY);
lhsmean[i]->filename = fname;
if ((lhsmean[i] = map_read(lhsmean[i])) == NULL)
ErrMsg(ER_READ, fname);
if (DEBUG_COV)
printlog("mean: %s, ", fname);
fname = string_dup(gl_marginal_names[i * 2 + 1]);
lhsvar[i] = new_map(READ_ONLY);
lhsvar[i]->filename = fname;
if ((lhsvar[i] = map_read(lhsvar[i])) == NULL)
ErrMsg(ER_READ, fname);
if (! map_equal(lhsmean[i], lhsvar[i]))
ErrMsg(ER_IMPOSVAL, "lhsmean and lhsvar: map topology differs");
if (DEBUG_COV)
printlog("variance: %s\n", fname);
}
}
/*
* initial check:
*/
row_Y = (Double_index *) emalloc(gl_nsim * sizeof(Double_index));
for (i = 0; i < n_vars; i++) {
if (d[i]->n_original > 0 && gl_marginal_names == NULL)
pr_warning("lhs(): define conditional distributions maps");
else if (gl_n_marginals == 0) { /* will derive marginal from sk_mean/vgm: */
vp = get_vgm(LTI(i, i));
if (! vp->is_valid_covariance)
pr_warning("lhs(): variogram without sill will lead to invalid marginal distribution");
if (d[i]->beta == NULL)
ErrMsg(ER_VARNOTSET, "beta/sk_mean not defined for data");
if (d[i]->beta->size > 1)
pr_warning("marginal distributions wrt beta will be incorrect");
}
}
/*
* for all variables do:
*/
for (i = 0; i < n_vars; i++) { /* loop over variables */
for (j = 0; j < n_sim_locs[i]; j++) { /* loop over sim. locations */
for (k = 0; k < gl_nsim; k++) {
row_Y[k].d = msim[i][j][k];
row_Y[k].index = k;
}
/*
* get mean:
*/
if (gl_marginal_names) { /* conditional mean & variance maps */
if (stratify)
map = 0;
else
map = i;
if (map_xy2rowcol(lhsmean[map],
d[i]->list[s2d[i][j]]->x, d[i]->list[s2d[i][j]]->y,
&r, &c)) {
pr_warning("x %g y %g",
d[i]->list[j]->x, d[i]->list[j]->y);
ErrMsg(ER_IMPOSVAL, "map_xy2rowcol");
}
mean = map_get_cell(lhsmean[map], r, c);
variance = map_get_cell(lhsvar[map], r, c);
} else if (gl_marginal_values) {
/* unconditional: prespecified marginal */
mean = gl_marginal_values[i * 2];
variance = gl_marginal_values[i * 2 + 1];
} else { /* unconditional: get marginals from data */
/* mean = d[i]->sk_mean; */
mean = d[i]->beta->val[0]; /* indeed, inconsistent!! */
/* mean = calc_mu(d[i], d[i]->??? ...) */
vp = get_vgm(LTI(i,i));
variance = vp->sum_sills;
}
if (DEBUG_COV)
printlog("marginals for %s: mean %g, variance %g\n",
name_identifier(i), mean, variance);
if (variance < 0.0)
ErrMsg(ER_IMPOSVAL, "lhs(): negative conditional variance");
lhs_one(row_Y, gl_nsim, mean, variance);
for (k = 0; k < gl_nsim; k++)
msim[i][j][k] = row_Y[k].d; /* copy back */
} /* for j */
} /* for i */
if (gl_marginal_names) {
for (i = 0; i < gl_n_marginals / 2; i++) {
map_free(lhsmean[i]);
map_free(lhsvar[i]);
}
}
efree(row_Y);
if (DEBUG_DUMP || DEBUG_COV)
printlog("done");
return;
}
#endif
static void lhs_one(Double_index *list, unsigned int dim,
double mean, double var) {
static int *rank = NULL, sizeof_rank = -1;
int i;
double xi;
if (rank == NULL || dim > sizeof_rank) {
rank = (int *) emalloc(dim * sizeof(int));
sizeof_rank = dim;
}
qsort((void *) list, (size_t) dim, sizeof(Double_index),
(int CDECL (*)(const void *, const void *)) double_index_cmp);
/*
* Get ranks -- after sorting row_Y on the ->d field,
* row_Y[0].index,...,row_Y[gl_nsim-1].index contains the original
* locations of consecutive elements in sim_values[j].
* Now we get ranks by:
*/
for (i = 0; i < dim; i++)
rank[list[i].index] = i;
/*
* produce Z : use eq. (10) in Stein (1987)
* (store in-place: replace .d values)
*/
for (i = 0; i < dim; i++) {
if (gl_lhs == 2)
xi = 0.5; /* Owen's suggestion */
else
xi = r_uniform();
list[i].d = mean + sqrt(var) * q_normal( (rank[i] + xi) / dim);
if (DEBUG_COV)
printlog("%g [%d]%s", list[i].d, rank[i], (i + 1) % 5 ? " " : "\n");
}
}
void setup_beta(DATA **d, int n_vars, int n_sim) {
double *est;
const double *sim = NULL;
int i, j, k, sum_n_X = 0, offset, *is_pt = NULL;
assert(beta == NULL); /* entered only once */
/* allocate beta */
beta = (double ***) emalloc(n_vars * sizeof(double **));
for (i = 0; i < n_vars; i++) {
assert(d[i]->n_list > 0);
beta[i] = (double **) emalloc(n_sim * sizeof(double *));
for (j = 0; j < n_sim; j++)
beta[i][j] = (double *) emalloc(d[i]->n_X * sizeof(double));
}
for (i = 0; i < n_vars; i++) {
if (d[i]->beta == NULL) /* push bogus values */
for (j = 0; j < d[i]->n_X; j++)
d[i]->beta = push_d_vector(-9999.9, d[i]->beta);
sum_n_X += d[i]->n_X;
}
printlog("drawing %d %s%s realisation%s of beta...\n", n_sim,
n_vars > 1 ? (gl_sim_beta == 0 ? "multivariate " : "univariate ") : "",
gl_sim_beta == 2 ? "OLS" : "GLS",
n_sim > 1 ? "s" : "");
is_pt = (int *) emalloc(sum_n_X * sizeof(int));
if (gl_sim_beta == 0) {
est = make_gls_mv(d, n_vars);
for (j = 0; j < n_sim; j++) {
sim = cond_sim(est, sum_n_X, GSI, is_pt, 0); /* length sum_n_X */
for (i = offset = 0; i < n_vars; i++) {
for (k = 0; k < d[i]->n_X; k++)
beta[i][j][k] = sim[offset + k];
offset += d[i]->n_X;
if (DEBUG_DUMP || DEBUG_COV) {
printlog("var=%d, sim=%d, beta=[ ", i, j);
for (k = 0; k < d[i]->n_X; k++)
printlog("%g ", beta[i][j][k]);
printlog("]\n");
}
}
}
efree(est);
} else {
for (i = 0; i < n_vars; i++) {
if (gl_sim_beta == 1)
est = make_gls(d[i], 0);
else /* gl_sim_beta == 2 */
est = make_ols(d[i]);
for (j = 0; j < n_sim; j++) {
sim = cond_sim(est, d[i]->n_X, GSI, is_pt, 0);
for (k = 0; k < d[i]->n_X; k++)
beta[i][j][k] = sim[k];
if (DEBUG_DUMP || DEBUG_COV) {
printlog("var=%d, sim=%d, beta=[ ", i, j);
for (k = 0; k < d[i]->n_X; k++)
printlog("%g ", beta[i][j][k]);
printlog("]\n");
}
}
efree(est);
}
}
efree(is_pt);
return;
}
void set_beta(DATA **d, int sim, int n_vars, METHOD method) {
/* n_vars == 0 --> stratified mode, check d[0]->id to find out which
* data we've got here
*/
int i;
assert(d[0]->beta);
if (beta == NULL) /* use the values entered by the user */
return;
if (get_mode() != STRATIFY) {
for (i = 0; i < n_vars; i++)
d[i]->beta->val = beta[i][sim];
} else
d[0]->beta->val = beta[d[0]->id][sim];
return;
}
#ifndef SIM_DOUBLE
float ***get_msim(void) {
return msim;
}
#endif