[L5-1] Simplify L2-norm function

victe · Aug 30, 2018 · ebfbceb · ebfbceb
1 parent 531e147
commit ebfbceb
Showing 1 changed file with 4 additions and 8 deletions.
diff --git a/lessons/05_relax/05_01_2D.Laplace.Equation.ipynb b/lessons/05_relax/05_01_2D.Laplace.Equation.ipynb
@@ -460,8 +460,6 @@
     "    \"\"\"\n",
     "    Computes and returns the relative L2-norm of the difference\n",
     "    between a solution p and a reference solution p_ref.\n",
-    "    If L2(p_ref) = 0, the function simply returns\n",
-    "    the L2-norm of the difference.\n",
     "\n",
     "    Parameters\n",
     "    ----------\n",
@@ -473,12 +471,10 @@
     "    Returns\n",
     "    -------\n",
     "    diff : float\n",
-    "        The (relative) L2-norm of the difference.\n",
+    "        The relative L2-norm of the difference.\n",
     "    \"\"\"\n",
-    "    l2_diff = numpy.sqrt(numpy.sum((p - p_ref)**2))\n",
-    "    l2_ref = numpy.sqrt(numpy.sum(p_ref**2))\n",
-    "    if l2_ref > 1e-12:\n",
-    "        return l2_diff / l2_ref\n",
+    "    l2_diff = (numpy.sqrt(numpy.sum((p - p_ref)**2)) /\n",
+    "               numpy.sqrt(numpy.sum(p_ref**2)))\n",
     "    return l2_diff"
    ]
   },
@@ -630,7 +626,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Jacobi relaxation: 4473 iterations to reach a relative difference of 9.989253685083211e-09\n"
+      "Jacobi relaxation: 4473 iterations to reach a relative difference of 9.989253685041417e-09\n"
      ]
     }
    ],