From f14e6eb0e8cb01ee29f98db9797ac37f3e690cb8 Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Fri, 20 Jul 2018 23:32:24 -0400
Subject: simplified ising example
---
src/wolff_ising.cpp | 115 ++++++----------------------------------------------
1 file changed, 13 insertions(+), 102 deletions(-)
diff --git a/src/wolff_ising.cpp b/src/wolff_ising.cpp
index 4d4c791..1812527 100644
--- a/src/wolff_ising.cpp
+++ b/src/wolff_ising.cpp
@@ -2,8 +2,6 @@
#include <getopt.h>
#include <wolff.h>
-#include <correlation.h>
-#include <measure.h>
int main(int argc, char *argv[]) {
@@ -15,13 +13,10 @@ int main(int argc, char *argv[]) {
double H = 0.0;
bool silent = false;
- bool N_is_sweeps = false;
int opt;
- unsigned char measurement_flags = measurement_energy | measurement_clusterSize;
-
- while ((opt = getopt(argc, argv, "N:q:D:L:T:J:H:sM:S")) != -1) {
+ while ((opt = getopt(argc, argv, "N:q:D:L:T:J:H:s")) != -1) {
switch (opt) {
case 'N': // number of steps
N = (count_t)atof(optarg);
@@ -41,118 +36,34 @@ int main(int argc, char *argv[]) {
case 's': // don't print anything during simulation. speeds up slightly
silent = true;
break;
- case 'M':
- measurement_flags ^= 1 << atoi(optarg);
- break;
- case 'S':
- N_is_sweeps = true;
- break;
default:
exit(EXIT_FAILURE);
}
}
- unsigned long timestamp;
-
- {
- struct timespec spec;
- clock_gettime(CLOCK_REALTIME, &spec);
- timestamp = spec.tv_sec*1000000000LL + spec.tv_nsec;
- }
-
- FILE *outfile_info = fopen("wolff_metadata.txt", "a");
-
- fprintf(outfile_info, "<| \"ID\" -> %lu, \"MODEL\" -> \"ISING\", \"q\" -> 2, \"D\" -> %" PRID ", \"L\" -> %" PRIL ", \"NV\" -> %" PRIv ", \"NE\" -> %" PRIv ", \"T\" -> %.15f, \"H\" -> %.15f |>\n", timestamp, D, L, (v_t)pow(L, D), D * (v_t)pow(L, D), T, H);
-
- fclose(outfile_info);
-
- unsigned int n_measurements = 0;
- std::function <void(const state_t <z2_t, ising_t> *)> *measurements = (std::function <void(const state_t <z2_t, ising_t> *)> *)calloc(POSSIBLE_MEASUREMENTS, sizeof(std::function <void(const state_t <z2_t, ising_t> *)>));
- FILE *outfile_M, *outfile_E, *outfile_S, *outfile_F;
-
- if (measurement_flags & measurement_energy) {
- char *filename_E = (char *)malloc(255 * sizeof(char));
- sprintf(filename_E, "wolff_%lu_E.dat", timestamp);
- outfile_E = fopen(filename_E, "wb");
- free(filename_E);
- measurements[n_measurements] = measurement_energy_file<z2_t, ising_t> (outfile_E);
- n_measurements++;
- }
-
- if (measurement_flags & measurement_clusterSize) {
- char *filename_S = (char *)malloc(255 * sizeof(char));
- sprintf(filename_S, "wolff_%lu_S.dat", timestamp);
- outfile_S = fopen(filename_S, "wb");
- free(filename_S);
- measurements[n_measurements] = measurement_cluster_file<z2_t, ising_t> (outfile_S);
- n_measurements++;
- }
-
- if (measurement_flags & measurement_magnetization) {
- char *filename_M = (char *)malloc(255 * sizeof(char));
- sprintf(filename_M, "wolff_%lu_M.dat", timestamp);
- outfile_M = fopen(filename_M, "wb");
- free(filename_M);
- measurements[n_measurements] = measurement_magnetization_file<z2_t, ising_t> (outfile_M);
- n_measurements++;
- }
-
- if (measurement_flags & measurement_fourierZero) {
- char *filename_F = (char *)malloc(255 * sizeof(char));
- sprintf(filename_F, "wolff_%lu_F.dat", timestamp);
- outfile_F = fopen(filename_F, "wb");
- free(filename_F);
- measurements[n_measurements] = measurement_fourier_file<z2_t, ising_t> (outfile_F);
- n_measurements++;
- }
-
- meas_t *meas_sweeps;
- if (N_is_sweeps) {
- meas_sweeps = (meas_t *)calloc(1, sizeof(meas_t));
- measurements[n_measurements] = measurement_average_cluster<z2_t, ising_t> (meas_sweeps);
- n_measurements++;
- }
-
// initialize random number generator
gsl_rng *r = gsl_rng_alloc(gsl_rng_mt19937);
gsl_rng_set(r, rand_seed());
state_t <z2_t, ising_t> s(D, L, T, ising_dot, std::bind(scalar_field, std::placeholders::_1, H));
- std::function <z2_t(gsl_rng *, const state_t <z2_t, ising_t> *)> gen = generate_ising_rotation;
+ std::function <z2_t(gsl_rng *, const state_t <z2_t, ising_t> *)> gen_R = generate_ising_rotation;
- if (N_is_sweeps) {
- count_t N_rounds = 0;
- printf("\n");
- while (N_rounds * N * meas_sweeps->x < N * s.nv) {
- printf("\033[F\033[J\033[F\033[JWOLFF: sweep %" PRIu64 " / %" PRIu64 ": E = %.2f, S = %" PRIv "\n", (count_t)(N_rounds * N * meas_sweeps->x / s.nv), N, s.E, s.last_cluster_size);
- wolff(N, &s, gen, n_measurements, measurements, r, silent);
- N_rounds++;
- }
- printf("\033[F\033[J\033[F\033[JWOLFF: sweep %" PRIu64 " / %" PRIu64 ": E = %.2f, S = %" PRIv "\n\n", (count_t)(N_rounds * N * meas_sweeps->x / s.nv), N, s.E, s.last_cluster_size);
- } else {
- wolff(N, &s, gen, n_measurements, measurements, r, silent);
- }
+ unsigned int n_measurements = 1;
- free(measurements);
+ double average_M = 0;
- if (measurement_flags & measurement_energy) {
- fclose(outfile_E);
- }
- if (measurement_flags & measurement_clusterSize) {
- fclose(outfile_S);
- }
- if (measurement_flags & measurement_magnetization) {
- fclose(outfile_M);
- }
- if (measurement_flags & measurement_fourierZero) {
- fclose(outfile_F);
- }
+ std::function <void(const state_t <z2_t, ising_t> *)> *measurements = (std::function <void(const state_t <z2_t, ising_t> *)> *)calloc(1, sizeof(std::function <void(const state_t <z2_t, ising_t> *)>));
- if (N_is_sweeps) {
- free(meas_sweeps);
- }
+ measurements[0] = [&] (const state_t <z2_t, ising_t> *s) {
+ average_M += (double)s->M / (double)N / (double)s->nv;
+ };
+ wolff(N, &s, gen_R, n_measurements, measurements, r, silent);
+
+ printf("%" PRIcount " Ising runs completed. D = %" PRID ", L = %" PRIL ", T = %g, H = %g, <M> = %g\n", N, D, L, T, H, average_M);
+
+ free(measurements);
gsl_rng_free(r);
return 0;
--
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