diff --git a/notebooks/01-plotting_intro.ipynb b/notebooks/01-plotting_intro.ipynb
index f302377..b6c2dd8 100644
--- a/notebooks/01-plotting_intro.ipynb
+++ b/notebooks/01-plotting_intro.ipynb
@@ -165,16 +165,11 @@
     "from IPython.display import HTML, display\n",
     "\n",
     "# Group by latitude and longitude\n",
-    "grouped = (\n",
-    "    df\n",
-    "    .groupby([\"latitude\", \"longitude\"])\n",
-    "    .size()\n",
-    "    .reset_index()\n",
-    "    .drop(columns=0)\n",
-    ")\n",
+    "grouped = df.groupby([\"latitude\", \"longitude\"]).size()\n",
+    "clean_grouped = grouped.reset_index().drop(columns=0)\n",
     "\n",
     "# Display unique latitude and longitude pairs in a scrollable table\n",
-    "unique_pairs = grouped[[\"latitude\", \"longitude\"]]\n",
+    "unique_pairs = clean_grouped[[\"latitude\", \"longitude\"]]\n",
     "\n",
     "# Reset index to include it in the DataFrame\n",
     "unique_pairs = unique_pairs.reset_index()\n",
@@ -202,10 +197,10 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Primeiro plot para Temperatura x Profundidade\n",
+    "# First plot with temperature x pressure\n",
     "fig, ax = df.plot_ctd(idx=0, var=\"temperature\", color=\"blue\")\n",
     "\n",
-    "# Segundo plot para Salinidade x Profundidade usando o mesmo eixo\n",
+    "# Second plot adding salinity x pressure to the same axis\n",
     "fig, ax = df.plot_ctd(idx=0, var=\"salinity\", ax=ax, color=\"red\")"
    ]
   }