feat(initconds): fix patient count

Author: TomMonks

content/14_initial_conditions.ipynb

@@ -354,7 +354,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 35,
    "id": "b3e686ce-5371-4471-a052-b9d43309bc85",
    "metadata": {},
    "outputs": [],
@@ -379,7 +379,7 @@
     "        inter_arrival_time = args.arrival_strokes.sample()\n",
     "        yield env.timeout(inter_arrival_time)\n",
     "\n",
-    "        args.results[\"n_arrivals\"] = patient_id\n",
+    "        args.results[\"n_arrivals\"] += 1\n",
     "        \n",
     "        trace(f\"{env.now:.2f}: Stroke arrival.\")\n",
     "\n",