fixed w38 4a error

doc/LectureNotes/_build/html/_sources/exercisesweek38.ipynb

@@ -290,7 +290,8 @@
     "$$\n",
     "\\mathrm{var}[\\tilde{y}]=\\mathbb{E}\\left[\\left(\\tilde{\\boldsymbol{y}}-\\mathbb{E}\\left[\\boldsymbol{\\tilde{y}}\\right]\\right)^2\\right]=\\frac{1}{n}\\sum_i(\\tilde{y}_i-\\mathbb{E}\\left[\\boldsymbol{\\tilde{y}}\\right])^2.\n",
     "$$\n",
-    "In order to arrive at the equation for the bias, we have to approximate the unknown function $f$ with the output/target values $y$."
+    "\n",
+    "In order to arrive at the equation for the bias, we have to approximate the unknown function $f$ with the output/target values $y$.\n"
    ]
   },
   {
@@ -321,7 +322,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 67,
+   "execution_count": null,
    "id": "b5bf581c",
    "metadata": {},
    "outputs": [],
@@ -332,7 +333,8 @@
     "bootstraps = 1000\n",
     "\n",
     "predictions = np.random.rand(bootstraps, n) * 10 + 10\n",
-    "targets = np.random.rand(bootstraps, n)\n",
+    "# The definition of targets has been updated, and was wrong earlier in the week.\n",
+    "targets = np.random.rand(1, n)\n",
     "\n",
     "mse = ...\n",
     "bias = ...\n",