additional doc changes

Author: jotok

simple-time-space-clustering.ipynb

@@ -69,7 +69,7 @@
     "distance metric and the formatof the input CSV. In order to work correctly, this function \n",
     "requires that the input data is sorted byincreasing timestamp values.\n",
     "\n",
-    "infile - path to input CSV file\n",
+    "infile - path to input CSV file. The data in this file should be sorted by timestamp.\n",
     "outfile - path where the output CSV file will be saved\n",
     "time_threshold - only record distances where the time difference is smaller than this timedelta\n",
     "space_threshold - only record distances if the space distance is smaller than this number\n",
@@ -139,7 +139,7 @@
     "# Set the input and output locations\n",
     "\n",
     "working_directory = \"/path/to/data\"\n",
-    "infile = os.path.join(working_directory, \"summer-travel-gps-full.csv\")\n",
+    "infile = os.path.join(working_directory, \"input_data_sorted_by_timestamp.csv\")\n",
     "outfile = os.path.join(working_directory, \"sparse_distance_matrix.csv\")\n",
     "\n",
     "# Set the threshold parameters for the distance calculation\n",