1 files changed, 7 insertions, 3 deletions

diff --git a/walk.cpp b/walk.cpp
index 529772e..2e22395 100644
--- a/walk.cpp
+++ b/walk.cpp
@@ -112,10 +112,11 @@ int main(int argc, char* argv[]) {
   Real T₀ = 2;
   Real E = 0;
   Real Δt = 1e-4;
+  Real Δt₀ = 1e-2;
 
   int opt;
 
-  while ((opt = getopt(argc, argv, "N:E:T:t:I:")) != -1) {
+  while ((opt = getopt(argc, argv, "N:E:T:t:I:i:")) != -1) {
     switch (opt) {
     case 'N':
       N = (unsigned)atof(optarg);
@@ -132,6 +133,9 @@ int main(int argc, char* argv[]) {
     case 't':
       Δt = atof(optarg);
       break;
+    case 'i':
+      Δt₀ = atof(optarg);
+      break;
     default:
       exit(1);
     }
@@ -145,8 +149,8 @@ int main(int argc, char* argv[]) {
 
   std::cout << std::setprecision(15);
 
-  for (Real t = 0; t < T₀; t += Δt) {
-    x₀ = randomStep(model, x₀, E, r, Δt);
+  for (Real t = 0; t < T₀; t += Δt₀) {
+    x₀ = randomStep(model, x₀, E, r, Δt₀);
   }
 
   Vector x = x₀;