removed example integers for legend loc kwarg

Author: Jahn, Kalle L

notebooks/part0_python_intro/06_matplotlib.ipynb

@@ -237,10 +237,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "fig = plt.figure()\n",
-    "ax = fig.add_axes(\n",
-    "    [0.1, 0.1, 0.8, 0.8]\n",
-    ")  # left, bottom, width, height (range 0 to 1)\n",
+    "fig = plt.subplots()\n",
     "ax.plot(x, x**2, label=\"curve1\")\n",
     "ax.plot(x, x**3, label=\"curve2\")\n",
     "ax.legend();"
@@ -252,26 +249,15 @@
    "source": [
     "The advantage with this method is that if curves are added or removed from the figure, the legend is automatically updated accordingly.\n",
     "\n",
-    "The `legend` function takes an optional keyword argument `loc` that can be used to specify where in the figure the legend is to be drawn. The allowed values of `loc` are numerical codes for the various places the legend can be drawn. See http://`matplotlib`.org/users/legend_guide.html#legend-location for details. Some of the most common `loc` values are:\n",
-    "\n",
-    "```python\n",
-    "ax.legend(loc=0) # let `matplotlib` decide the optimal location\n",
-    "ax.legend(loc=1) # upper right corner\n",
-    "ax.legend(loc=2) # upper left corner\n",
-    "ax.legend(loc=3) # lower left corner\n",
-    "ax.legend(loc=4) # lower right corner\n",
-    "```\n",
-    "\n",
-    "# .. many more options are available\n",
-    "\n",
-    "Alternatively, location keywords can also be used.\n",
+    "The `legend` function takes an optional keyword argument `loc` that can be used to specify where in the figure the legend is to be drawn. The allowed values of `loc` are keywords for the various places the legend can be drawn. See https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.legend.html#matplotlib.axes.Axes.legend for details. Some of the most common `loc` values are:\n",
     "\n",
     "```python\n",
     "ax.legend(loc='best')\n",
     "ax.legend(loc='upper right')\n",
     "ax.legend(loc='upper left')\n",
     "ax.legend(loc='lower left')\n",
     "ax.legend(loc='lower right')\n",
+    "ax.legend(loc='lower center')\n",
     "```\n",
     "\n",
     "## Setting colors, linewidths, linetypes\n",