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-rw-r--r--src/scaling.c346
1 files changed, 34 insertions, 312 deletions
diff --git a/src/scaling.c b/src/scaling.c
index b2f063ec..bf8857ac 100644
--- a/src/scaling.c
+++ b/src/scaling.c
@@ -48,184 +48,6 @@
#include "scaling.h"
-/* Maximum number of iterations of NLSq to do for each image per macrocycle. */
-#define MAX_CYCLES (10)
-
-
-/* Apply the given shift to the 'k'th parameter of 'image'. */
-static void apply_shift(Crystal *cr, int k, double shift)
-{
- double t;
-
- switch ( k ) {
-
- case GPARAM_BFAC :
- t = crystal_get_Bfac(cr);
- t += shift;
- crystal_set_Bfac(cr, t);
- break;
-
- case GPARAM_OSF :
- t = -log(crystal_get_osf(cr));
- t += shift;
- crystal_set_osf(cr, exp(-t));
- break;
-
- default :
- ERROR("No shift defined for parameter %i\n", k);
- abort();
-
- }
-}
-
-
-/* Perform one cycle of scaling of 'cr' against 'full' */
-static double scale_iterate(Crystal *cr, const RefList *full,
- PartialityModel pmodel, int *nr)
-{
- gsl_matrix *M;
- gsl_vector *v;
- gsl_vector *shifts;
- int param;
- Reflection *refl;
- RefListIterator *iter;
- RefList *reflections;
- double max_shift;
- int nref = 0;
- int num_params = 0;
- enum gparam rv[32];
- double G, B;
-
- *nr = 0;
-
- rv[num_params++] = GPARAM_OSF;
- rv[num_params++] = GPARAM_BFAC;
-
- M = gsl_matrix_calloc(num_params, num_params);
- v = gsl_vector_calloc(num_params);
-
- reflections = crystal_get_reflections(cr);
- G = crystal_get_osf(cr);
- B = crystal_get_Bfac(cr);
-
- /* Scaling terms */
- for ( refl = first_refl(reflections, &iter);
- refl != NULL;
- refl = next_refl(refl, iter) )
- {
- signed int ha, ka, la;
- double I_full, delta_I, esd;
- double w;
- double I_partial;
- int k;
- double p, L, s;
- double fx;
- Reflection *match;
- double gradients[num_params];
-
- /* If reflection is free-flagged, don't use it here */
- if ( get_flag(refl) ) continue;
-
- /* Find the full version */
- get_indices(refl, &ha, &ka, &la);
- match = find_refl(full, ha, ka, la);
- if ( match == NULL ) continue;
-
- /* Merged intensitty */
- I_full = get_intensity(match);
-
- /* Actual measurement of this reflection from this pattern */
- I_partial = get_intensity(refl);
- esd = get_esd_intensity(refl);
- p = get_partiality(refl);
-
- /* Scale only using strong reflections */
- if ( I_partial <= 3.0*esd ) continue; /* Also because of log */
- if ( get_redundancy(match) < 2 ) continue;
- if ( I_full <= 0 ) continue; /* Because log */
- if ( p <= 0.0 ) continue; /* Because of log */
-
- L = get_lorentz(refl);
- s = resolution(crystal_get_cell(cr), ha, ka, la);
-
- /* Calculate the weight for this reflection */
- w = 1.0;
-
- /* Calculate all gradients for this reflection */
- for ( k=0; k<num_params; k++ ) {
-
- if ( rv[k] == GPARAM_OSF ) {
- gradients[k] = 1.0;
- } else if ( rv[k] == GPARAM_BFAC ) {
- gradients[k] = -s*s;
- } else {
- ERROR("Unrecognised scaling gradient.\n");
- abort();
- }
- }
-
- for ( k=0; k<num_params; k++ ) {
-
- int g;
- double v_c, v_curr;
-
- for ( g=0; g<num_params; g++ ) {
-
- double M_c, M_curr;
-
- /* Matrix is symmetric */
- if ( g > k ) continue;
-
- M_c = w * gradients[g] * gradients[k];
-
- M_curr = gsl_matrix_get(M, k, g);
- gsl_matrix_set(M, k, g, M_curr + M_c);
- gsl_matrix_set(M, g, k, M_curr + M_c);
-
- }
-
- fx = -log(G) + log(p) - log(L) - B*s*s + log(I_full);
- delta_I = log(I_partial) - fx;
- v_c = w * delta_I * gradients[k];
- v_curr = gsl_vector_get(v, k);
- gsl_vector_set(v, k, v_curr + v_c);
-
- }
-
- nref++;
- }
-
- *nr = nref;
-
- if ( nref < num_params ) {
- crystal_set_user_flag(cr, PRFLAG_FEWREFL);
- gsl_matrix_free(M);
- gsl_vector_free(v);
- return 0.0;
- }
-
- max_shift = 0.0;
- shifts = solve_svd(v, M, NULL, 0);
- if ( shifts != NULL ) {
-
- for ( param=0; param<num_params; param++ ) {
- double shift = gsl_vector_get(shifts, param);
- apply_shift(cr, rv[param], shift);
- if ( fabs(shift) > max_shift ) max_shift = fabs(shift);
- }
-
- } else {
- crystal_set_user_flag(cr, PRFLAG_SOLVEFAIL);
- }
-
- gsl_matrix_free(M);
- gsl_vector_free(v);
- gsl_vector_free(shifts);
-
- return max_shift;
-}
-
-
double log_residual(Crystal *cr, const RefList *full, int free,
int *pn_used, const char *filename)
{
@@ -292,32 +114,6 @@ double log_residual(Crystal *cr, const RefList *full, int free,
}
-static void do_scale_refine(Crystal *cr, const RefList *full,
- PartialityModel pmodel, int *nr)
-{
- int i, done;
- double old_dev;
-
- old_dev = log_residual(cr, full, 0, NULL, NULL);
-
- i = 0;
- done = 0;
- do {
-
- double dev;
-
- scale_iterate(cr, full, pmodel, nr);
-
- dev = log_residual(cr, full, 0, 0, NULL);
- if ( fabs(dev - old_dev) < dev*0.01 ) done = 1;
-
- i++;
- old_dev = dev;
-
- } while ( i < MAX_CYCLES && !done );
-}
-
-
struct scale_args
{
RefList *full;
@@ -341,8 +137,14 @@ struct queue_args
static void scale_crystal(void *task, int id)
{
struct scale_args *pargs = task;
- do_scale_refine(pargs->crystal, pargs->full, pargs->pmodel,
- &pargs->n_reflections);
+ int r;
+ double G;
+
+ /* Simple iterative algorithm */
+ r = linear_scale(pargs->full, crystal_get_reflections(pargs->crystal), &G);
+ if ( r == 0 ) {
+ crystal_set_osf(pargs->crystal, G);
+ } /* else don't change it */
}
@@ -375,91 +177,6 @@ static void done_crystal(void *vqargs, void *task)
}
-static double total_log_r(Crystal **crystals, int n_crystals, RefList *full,
- int *ninc)
-{
- int i;
- double total = 0.0;
- int n = 0;
-
- for ( i=0; i<n_crystals; i++ ) {
-
- double r;
- if ( crystal_get_user_flag(crystals[i]) ) continue;
- r = log_residual(crystals[i], full, 0, NULL, NULL);
- if ( isnan(r) ) continue;
- total += r;
- n++;
-
- }
-
- if ( ninc != NULL ) *ninc = n;
- return total;
-}
-
-
-/* Perform iterative scaling, all the way to convergence */
-void scale_all(Crystal **crystals, int n_crystals, int nthreads,
- PartialityModel pmodel)
-{
- struct scale_args task_defaults;
- struct queue_args qargs;
- double old_res, new_res;
- int niter = 0;
-
- task_defaults.crystal = NULL;
- task_defaults.pmodel = pmodel;
-
- qargs.task_defaults = task_defaults;
- qargs.n_crystals = n_crystals;
- qargs.crystals = crystals;
-
- /* Don't have threads which are doing nothing */
- if ( n_crystals < nthreads ) nthreads = n_crystals;
-
- new_res = INFINITY;
- do {
- RefList *full;
- int ninc;
- double bef_res;
-
- full = merge_intensities(crystals, n_crystals, nthreads,
- pmodel, 2, INFINITY, 0);
- old_res = new_res;
- bef_res = total_log_r(crystals, n_crystals, full, NULL);
-
- qargs.task_defaults.full = full;
- qargs.n_started = 0;
- qargs.n_done = 0;
- qargs.n_reflections = 0;
- run_threads(nthreads, scale_crystal, get_crystal, done_crystal,
- &qargs, n_crystals, 0, 0, 0);
- STATUS("%lli reflections went into the scaling.\n",
- qargs.n_reflections);
-
- new_res = total_log_r(crystals, n_crystals, full, &ninc);
- STATUS("Log residual went from %e to %e, %i crystals\n",
- bef_res, new_res, ninc);
-
- int i;
- double meanB = 0.0;
- for ( i=0; i<n_crystals; i++ ) {
- meanB += crystal_get_Bfac(crystals[i]);
- }
- meanB /= n_crystals;
- STATUS("Mean B = %e\n", meanB);
-
- reflist_free(full);
- niter++;
-
- } while ( (fabs(new_res-old_res) >= 0.01*old_res) && (niter < 10) );
-
- if ( niter == 10 ) {
- ERROR("Too many iterations - giving up!\n");
- }
-}
-
-
/* Calculates G, by which list2 should be multiplied to fit list1 */
int linear_scale(const RefList *list1, const RefList *list2, double *G)
{
@@ -490,6 +207,7 @@ int linear_scale(const RefList *list1, const RefList *list2, double *G)
{
signed int h, k, l;
double Ih1, Ih2;
+ double esd1, esd2;
nb++;
get_indices(refl1, &h, &k, &l);
@@ -500,8 +218,13 @@ int linear_scale(const RefList *list1, const RefList *list2, double *G)
Ih1 = get_intensity(refl1);
Ih2 = get_intensity(refl2);
+ esd1 = get_esd_intensity(refl1);
+ esd2 = get_esd_intensity(refl2);
+ if ( Ih1 <= 3.0*esd1 ) continue;
+ if ( Ih2 <= 3.0*esd2 ) continue;
if ( (Ih1 <= 0.0) || (Ih2 <= 0.0) ) continue;
+ if ( get_redundancy(refl1) < 2 ) continue;
if ( isnan(Ih1) || isinf(Ih1) ) continue;
if ( isnan(Ih2) || isinf(Ih2) ) continue;
@@ -537,7 +260,7 @@ int linear_scale(const RefList *list1, const RefList *list2, double *G)
if ( isnan(*G) ) {
ERROR("Scaling gave NaN (%i pairs)\n", n);
- abort();
+ *G = 1.0;
return 1;
}
@@ -550,25 +273,24 @@ int linear_scale(const RefList *list1, const RefList *list2, double *G)
void scale_all_to_reference(Crystal **crystals, int n_crystals,
- RefList *reference)
+ RefList *reference, int nthreads)
{
- int i;
-
- for ( i=0; i<n_crystals; i++ ) {
- double G;
- if ( linear_scale(reference,
- crystal_get_reflections(crystals[i]),
- &G) == 0 )
- {
- if ( isnan(G) ) {
- ERROR("NaN scaling factor for crystal %i\n", i);
- }
- crystal_set_osf(crystals[i], G);
- crystal_set_Bfac(crystals[i], 0.0);
- } else {
- ERROR("Scaling failed for crystal %i\n", i);
- }
- progress_bar(i, n_crystals, "Scaling to reference");
- }
- progress_bar(n_crystals, n_crystals, "Scaling to reference");
+ struct scale_args task_defaults;
+ struct queue_args qargs;
+
+ task_defaults.crystal = NULL;
+
+ qargs.task_defaults = task_defaults;
+ qargs.n_crystals = n_crystals;
+ qargs.crystals = crystals;
+
+ /* Don't have threads which are doing nothing */
+ if ( n_crystals < nthreads ) nthreads = n_crystals;
+
+ qargs.task_defaults.full = reference;
+ qargs.n_started = 0;
+ qargs.n_done = 0;
+ qargs.n_reflections = 0;
+ run_threads(nthreads, scale_crystal, get_crystal, done_crystal,
+ &qargs, n_crystals, 0, 0, 0);
}