updating header

Author: negin513

intermediate/indexing/advanced-indexing.ipynb

@@ -190,7 +190,7 @@
     "\n",
     "But what if we would like to find the information from the nearest grid cell to a collection of specified points (for example, weather stations or tower data)?\n",
     "\n",
-    "## Pointwise Indexing in Xarray\n",
+    "## Vectorized or Pointwise Indexing in Xarray\n",
     "\n",
     "Like NumPy and pandas, Xarray supports indexing many array elements at once in a *vectorized* manner. \n",
     "\n",
@@ -293,14 +293,14 @@
     "## Excersises\n",
     "\n",
     "```{exercise}\n",
-    ":label: indexing-1\n",
+    ":label: indexing-advanced-1\n",
     "\n",
     "In the simple 2D 5x5 Xarray data array above, select the sub-array containing (0,0),(2,2),(4,4) : \n",
     "```\n",
     "\n",
     "\n",
     "\n",
-    "````{solution} indexing-1\n",
+    "````{solution} indexing-advanced-1\n",
     ":class: dropdown\n",
     "```python\n",
     "\n",