diff --git a/lecture_material/16-viz-1/vis_1.ipynb b/lecture_material/16-viz-1/vis_1.ipynb
index 66843b22750272122e81b4c9fc0464ad43dd49a9..39831936ea552af45cf83c5d0612739042220c50 100644
--- a/lecture_material/16-viz-1/vis_1.ipynb
+++ b/lecture_material/16-viz-1/vis_1.ipynb
@@ -361,7 +361,7 @@
     "# Observe that we get a different circle\n",
     "\n",
     "# Transform based on ax1, but crop based on ax2\n",
-    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax1\n",
+    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax2\n",
     "c = plt.Circle((1, 1), 0.3, transform=ax1.transData) # where to position the shape\n",
     "ax1.add_artist(c)  # how to crop the shape\n",
     "\n",
@@ -518,7 +518,7 @@
     "\n",
     "- `ax.transData.transform((x, y))`: converts axes / data coords into raw coordinates\n",
     "- How to draw an arrow:\n",
-    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, (<y2>)), transform=None, arrowstyle=<STYLE>)`\n",
+    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, <y2>)), transform=None, arrowstyle=<STYLE>)`\n",
     "    - arrowstyle=\"simple,head_width=10,head_length=10\""
    ]
   },
diff --git a/lecture_material/16-viz-1/vis_1_lec_001.ipynb b/lecture_material/16-viz-1/vis_1_lec_001.ipynb
index f1f16e67a8d2e58aa7ed1490b1d8cfae36bcb176..e60ae70dc5342eb799e6e9d040f804bf4a880e69 100644
--- a/lecture_material/16-viz-1/vis_1_lec_001.ipynb
+++ b/lecture_material/16-viz-1/vis_1_lec_001.ipynb
@@ -238,7 +238,7 @@
     "# Observe that we get a different circle\n",
     "\n",
     "# Transform based on ax1, but crop based on ax2\n",
-    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax1\n",
+    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax2\n",
     " # where to position the shape \n",
     " # how to crop the shape\n",
     "\n",
@@ -350,7 +350,7 @@
     "\n",
     "- `ax.transData.transform((x, y))`: converts axes / data coords into raw coordinates\n",
     "- How to draw an arrow:\n",
-    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, (<y2>)), transform=None, arrowstyle=<STYLE>)`\n",
+    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, <y2>)), transform=None, arrowstyle=<STYLE>)`\n",
     "    - arrowstyle=\"simple,head_width=10,head_length=10\""
    ]
   },
diff --git a/lecture_material/16-viz-1/vis_1_lec_002.ipynb b/lecture_material/16-viz-1/vis_1_lec_002.ipynb
index f1f16e67a8d2e58aa7ed1490b1d8cfae36bcb176..e60ae70dc5342eb799e6e9d040f804bf4a880e69 100644
--- a/lecture_material/16-viz-1/vis_1_lec_002.ipynb
+++ b/lecture_material/16-viz-1/vis_1_lec_002.ipynb
@@ -238,7 +238,7 @@
     "# Observe that we get a different circle\n",
     "\n",
     "# Transform based on ax1, but crop based on ax2\n",
-    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax1\n",
+    "# Left subplot: plot Circle at (1, 1) with radius 0.3 and crop using ax2\n",
     " # where to position the shape \n",
     " # how to crop the shape\n",
     "\n",
@@ -350,7 +350,7 @@
     "\n",
     "- `ax.transData.transform((x, y))`: converts axes / data coords into raw coordinates\n",
     "- How to draw an arrow:\n",
-    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, (<y2>)), transform=None, arrowstyle=<STYLE>)`\n",
+    "    `matplotlib.patches.FancyArrowPatch((<x1>, <y1>), (<x2>, <y2>)), transform=None, arrowstyle=<STYLE>)`\n",
     "    - arrowstyle=\"simple,head_width=10,head_length=10\""
    ]
   },