Look at frequencies of screen statuses and explain (un)lock sequences.

config/environment.yml

@@ -13,4 +13,5 @@ dependencies:
   - psycopg2
   - python-dotenv
   - seaborn
-  - sqlalchemy
+  - sqlalchemy
+  - tabulate

exploration/screen.ipynb

@@ -7,6 +7,7 @@
    "outputs": [],
    "source": [
     "import os, sys\n",
+    "from tabulate import tabulate\n",
     "nb_dir = os.path.split(os.getcwd())[0]\n",
     "if nb_dir not in sys.path:\n",
     "    sys.path.append(nb_dir)"
@@ -91,13 +92,18 @@
    "outputs": [
     {
      "data": {
+      "text/html": [
+       "<table>\n",
+       "<tbody>\n",
+       "<tr><td>off     </td><td style=\"text-align: right;\">70243</td></tr>\n",
+       "<tr><td>on      </td><td style=\"text-align: right;\">70012</td></tr>\n",
+       "<tr><td>locked  </td><td style=\"text-align: right;\">63080</td></tr>\n",
+       "<tr><td>unlocked</td><td style=\"text-align: right;\">36666</td></tr>\n",
+       "</tbody>\n",
+       "</table>"
+      ],
       "text/plain": [
-       "screen_status\n",
+       "'<table>\\n<tbody>\\n<tr><td>off     </td><td style=\"text-align: right;\">70243</td></tr>\\n<tr><td>on      </td><td style=\"text-align: right;\">70012</td></tr>\\n<tr><td>locked  </td><td style=\"text-align: right;\">63080</td></tr>\\n<tr><td>unlocked</td><td style=\"text-align: right;\">36666</td></tr>\\n</tbody>\\n</table>'"
-       "0    70243\n",
-       "1    70012\n",
-       "2    63080\n",
-       "3    36666\n",
-       "dtype: int64"
       ]
      },
      "execution_count": 6,
@@ -106,7 +112,121 @@
     }
    ],
    "source": [
-    "df_screen_inactive.value_counts(\"screen_status\")"
+    "df_screen_inactive[\"screen_status\"] = df_screen_inactive[\"screen_status\"].astype(\"category\").cat.rename_categories(screen_status)\n",
+    "screen_freq = df_screen_inactive.value_counts(\"screen_status\")\n",
+    "tabulate(screen_freq.to_frame(), tablefmt='html')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{0: 'off', 1: 'on', 2: 'locked', 3: 'unlocked'}"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "screen_status"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "A typical sequence might be: off -> locked -> on -> unlocked (0 -> 2 -> 1 -> 3)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>screen_status</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>-1.0</th>\n",
+       "      <td>810</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2.0</th>\n",
+       "      <td>779</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>-3.0</th>\n",
+       "      <td>238</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1.0</th>\n",
+       "      <td>44</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>-2.0</th>\n",
+       "      <td>38</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>0.0</th>\n",
+       "      <td>6</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "      screen_status\n",
+       "-1.0            810\n",
+       " 2.0            779\n",
+       "-3.0            238\n",
+       " 1.0             44\n",
+       "-2.0             38\n",
+       " 0.0              6"
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "status_diff = df_screen_nokia.sort_values(\"timestamp\")[\"screen_status\"].diff()\n",
+    "status_diff.value_counts().to_frame()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "But I have also seen off -> on -> unlocked (with 2 - locked missing) and off -> locked -> on -> off -> locked (*again*)."
    ]
   }
  ],
@@ -126,7 +246,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.2"
+   "version": "3.9.4"
   }
  },
  "nbformat": 4,