Particle filter is now using a fixed time interval as step

code/Plotta.h

@@ -6,6 +6,7 @@
 #include <vector>
 #include <unordered_map>
 #include <iostream>
+#include <array>
 
 namespace Plotta
 {
@@ -39,6 +40,8 @@ namespace Plotta
         {
             // send data
             std::ofstream stream;
+            stream.exceptions(stream.exceptions() | std::ios::failbit);
+
             stream.open(dataFile);
 
             std::time_t t = std::time(nullptr);
@@ -126,6 +129,12 @@ namespace Plotta
         return writeNumpyArray(stream, list.begin(), list.end());
     }
 
+    template<typename T, size_t S>
+    plottastream& operator<<(plottastream& stream, const std::array<T, S>& list)
+    {
+        return writeNumpyArray(stream, list.begin(), list.end());
+    }
+
 
     template<typename T>
     static plottastream& operator<<(plottastream& stream, const T& value)