From 47546b445b18cbc13892702cabd4c22968a9bde9 Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Sat, 21 Dec 2019 15:51:57 -0500
Subject: now using random choice of pairs to swap instead of sweeping left to
 right

---
 hadamard.cpp    | 11 ++++-------
 hadamard_pt.hpp | 16 ++++------------
 2 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/hadamard.cpp b/hadamard.cpp
index 2f45dcc..d9e5bfd 100644
--- a/hadamard.cpp
+++ b/hadamard.cpp
@@ -35,19 +35,16 @@ public:
 class MeasureTransitionRates : public ParallelMeasurement {
 public:
   std::vector<unsigned> nAccepted;
-  unsigned total_steps;
+  std::vector<unsigned> total_steps;
 
-  MeasureTransitionRates(unsigned n) : nAccepted(n - 1, 0) {
-    total_steps = 0;
-  }
+  MeasureTransitionRates(unsigned n) : nAccepted(n - 1, 0), total_steps(n - 1, 0) {}
 
   void after_step(bool accepted, unsigned i, double, double, const MCMC&,
                   const MCMC&) override {
+    total_steps[i]++;
     if (accepted)
       nAccepted[i]++;
   }
-
-  void after_sweep(const std::vector<MCMC>&) override { total_steps++; }
 };
 
 int main(int argc, char* argv[]) {
@@ -139,7 +136,7 @@ int main(int argc, char* argv[]) {
   file << std::endl;
 
   for (unsigned i = 0; i < B.nAccepted.size(); i++) {
-    file << std::fixed << B.nAccepted[i] / (double)B.total_steps << " ";
+    file << std::fixed << B.nAccepted[i] / (double)B.total_steps[i] << " ";
   }
   file << std::endl;
 
diff --git a/hadamard_pt.hpp b/hadamard_pt.hpp
index 67cb710..9365e50 100644
--- a/hadamard_pt.hpp
+++ b/hadamard_pt.hpp
@@ -11,7 +11,6 @@ void swap(MCMC& s1, MCMC& s2) {
 class ParallelMeasurement {
 public:
   virtual void after_step(bool, unsigned, double, double, const MCMC&, const MCMC&){};
-  virtual void after_sweep(const std::vector<MCMC>&){};
 };
 
 typedef struct range {
@@ -57,13 +56,6 @@ public:
     return accepted;
   }
 
-  void sweep(bool dry = false) {
-
-    for (unsigned i = 0; i < Ms.size() - 1; i++) {
-      this->step(i, i + 1, dry);
-    }
-  }
-
   std::vector<double> tune(unsigned n0, unsigned m, double ε, double ε2) {
     unsigned n = n0;
 
@@ -82,7 +74,7 @@ public:
         }
 
         for (unsigned k = 0; k < m * Ms.size() - 1; k++) {
-          unsigned j = Ms[0].rng.uniform((unsigned)0, (unsigned)(Ms.size() - 2));
+          unsigned j = rng.uniform((unsigned)0, (unsigned)(Ms.size() - 2));
 
           if (this->step(j, j + 1, true)) {
             std::swap(colors[j], colors[j + 1]);
@@ -165,9 +157,9 @@ public:
       for (unsigned j = 0; j < Ms.size(); j++) {
         Ms[j].run(m, dry);
       }
-      this->sweep(dry);
-      if (!dry) {
-        B.after_sweep(this->Ms);
+      for (unsigned j = 0; j < Ms.size() * m; j++) {
+        unsigned k = rng.uniform((unsigned)0, (unsigned)(Ms.size() - 2));
+        this->step(k, k + 1, dry);
       }
     }
   }
-- 
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