diff --git a/cpp/switchchain_ccm_timeevol.cpp b/cpp/switchchain_ccm_timeevol.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..22db8bb0eea8b3bab2703031c368a214fd8109c3
--- /dev/null
+++ b/cpp/switchchain_ccm_timeevol.cpp
@@ -0,0 +1,154 @@
+#include "exports.hpp"
+#include "graph.hpp"
+#include "graph_ccm.hpp"
+#include "graph_powerlaw.hpp"
+#include "switchchain.hpp"
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <numeric>
+#include <random>
+#include <vector>
+
+int main(int argc, char* argv[]) {
+    // Simulation parameters
+    const int numVerticesMin = 1000;
+    const int numVerticesMax = 1000;
+    const int numVerticesStep = 1000;
+
+    //float tauValues[] = {2.1f, 2.2f, 2.3f, 2.4f, 2.5f, 2.6f, 2.7f, 2.8f, 2.9f};
+    float tauValues[] = {2.1f, 2.3f, 2.5f, 2.7f, 2.9f};
+
+    const int totalDegreeSamples = 10;
+
+    auto getMixingTime = [](int n, float tau) {
+        return int(1.0f * (50.0f - 10.0f * (tau - 2.0f)) * n);
+    };
+
+    // Output file
+    std::ofstream outfile;
+    if (argc >= 2)
+        outfile.open(argv[1]);
+    else
+        outfile.open("graphdata_ccm_timeevol.m");
+    if (!outfile.is_open()) {
+        std::cout << "ERROR: Could not open output file.\n";
+        return 1;
+    }
+
+    // Output Mathematica-style comment to indicate file contents
+    outfile << "(*\n";
+    outfile << "n from " << numVerticesMin << " to " << numVerticesMax
+            << " step " << numVerticesStep << std::endl;
+    outfile << "tauValues: " << tauValues << std::endl;
+    outfile << "degreeSamples: " << totalDegreeSamples << std::endl;
+    //outfile << "canonical ds" << std::endl;
+    outfile << "mixingTime: 0.5 * (50 - 10 (tau - 2)) n\n";
+    outfile << "measurements: full time evol\n";
+    outfile << "data:\n";
+    outfile << "1: {n,tau}\n";
+    outfile << "2: edges\n";
+    outfile << "3: HH triangle seq\n";
+    outfile << "4: {ccm1 failed attempts, triangle seq}\n";
+    outfile << "5: {ccm2 failed attempts, triangle seq}\n";
+    outfile << "*)" << std::endl;
+ 
+    // Mathematica does not accept normal scientific notation
+    outfile << std::fixed;
+    outfile << '{' << '\n';
+    bool outputComma = false;
+
+    std::mt19937 rng(std::random_device{}());
+    Graph g;
+    for (int numVertices = numVerticesMin; numVertices <= numVerticesMax;
+         numVertices += numVerticesStep) {
+        for (float tau : tauValues) {
+            int mixingTime = getMixingTime(numVertices, tau);
+
+            // For a single n,tau take samples over several instances of
+            // the degree distribution.
+            for (int degreeSample = 0; degreeSample < totalDegreeSamples;
+                 ++degreeSample) {
+                DegreeSequence ds;
+                //generatePowerlawGraph(numVertices, tau, g, ds, rng);
+                generateCanonicalPowerlawGraph(numVertices, tau, g, ds);
+
+                std::cout << "Running (n,tau) = (" << numVertices << ',' << tau
+                          << "). " << std::flush;
+
+                SwitchChain chain;
+                if (!chain.initialize(g, true)) {
+                    std::cerr << "Could not initialize Markov chain.\n";
+                    return 1;
+                }
+
+                std::vector<int> triangleSeq(mixingTime);
+                for (int i = 0; i < mixingTime; ++i) {
+                    chain.doMove(true);
+                    triangleSeq[i] = chain.g.getTrackedTriangles();
+                }
+
+                std::cout << " Finished HH time evol." << std::flush;
+
+
+                if (outputComma)
+                    outfile << ',' << '\n';
+                outputComma = true;
+
+                outfile << '{';
+                outfile << '{' << numVertices << ',' << tau << '}';
+                outfile << ',' << g.edgeCount();
+                outfile << ',' << triangleSeq;
+
+                for (int ccmType = 1; ccmType <= 2; ++ccmType) {
+                    bool ccmMethod = (ccmType == 1 ? false : true);
+#if 0
+                    outfile << ',' << '{';
+                    for (int i = 0; i < 10; ++i) {
+                        if (i != 0)
+                            outfile << ',';
+                        Graph gtemp;
+                        if (constrainedConfigurationModel(ds, gtemp, rng,
+                                                          ccmMethod)) {
+                            chain.initialize(gtemp, true);
+                            for (int i = 0; i < mixingTime; ++i) {
+                                chain.doMove(true);
+                                triangleSeq[i] = chain.g.getTrackedTriangles();
+                            }
+                            outfile << triangleSeq;
+                        } else {
+                            outfile << '{' << '}';
+                        }
+                    }
+                    outfile << '}';
+#endif
+                    bool failed = true;
+                    for (int i = 0; i < 50; ++i) {
+                        Graph gtemp;
+                        if (constrainedConfigurationModel(ds, gtemp, rng,
+                                                          ccmMethod)) {
+                            chain.initialize(gtemp, true);
+                            for (int i = 0; i < mixingTime; ++i) {
+                                chain.doMove(true);
+                                triangleSeq[i] = chain.g.getTrackedTriangles();
+                            }
+                            outfile << ',' << '{' << i << ',' << triangleSeq << '}';
+                            failed = false;
+                            break;
+                        }
+                    }
+                    if (failed)
+                        outfile << ",{50,{}}";
+                }
+
+                outfile << '}' << std::flush;
+
+                std::cout << " Finished CCM time evols." << std::flush;
+
+                std::cout << std::endl;
+            }
+        }
+    }
+    outfile << '\n' << '}';
+    return 0;
+}