matplotlib · timhoffm · Aug 3, 2023 · Jul 17, 2023
diff --git a/doc/sphinxext/gallery_order.py b/doc/sphinxext/gallery_order.py
@@ -38,8 +38,8 @@
 
 plot_types_order = [
     '../galleries/plot_types/basic',
-    '../galleries/plot_types/arrays',
     '../galleries/plot_types/stats',
+    '../galleries/plot_types/arrays',
     '../galleries/plot_types/unstructured',
     '../galleries/plot_types/3D',
     UNSORTED

diff --git a/galleries/plot_types/3D/README.rst b/galleries/plot_types/3D/README.rst
@@ -1,6 +1,7 @@
 .. _3D_plots:
 
-3D
---
+3D and volumetric data
+----------------------
 
-3D plots using the `mpl_toolkits.mplot3d` library.
+Plots of three-dimensional :math:`(x,y,z)`, surface :math:`f(x,y)=z`, and
+volumetric :math:`V_{x, y, z}` data using the `mpl_toolkits.mplot3d` library.
diff --git a/galleries/plot_types/README.rst b/galleries/plot_types/README.rst
@@ -5,8 +5,7 @@
 Plot types
 ==========
 
-Overview of many common plotting commands in Matplotlib.
+Overview of many common plotting commands provided by Matplotlib.
 
-Note that we have stripped all labels, but they are present by default.
-See the `gallery <../gallery/index.html>`_ for many more examples and
+See the `gallery <../gallery/index.html>`_ for more examples and
 the `tutorials page <../tutorials/index.html>`_ for longer examples.
diff --git a/galleries/plot_types/arrays/README.rst b/galleries/plot_types/arrays/README.rst
@@ -1,6 +1,8 @@
 .. _array_plots:
 
-Plots of arrays and fields
---------------------------
+Gridded data:
+-------------
 
-Plotting for arrays of data ``Z(x, y)`` and fields ``U(x, y), V(x, y)``.
+Plots of arrays and images :math:`Z_{i, j}` and fields :math:`U_{i, j}, V_{i, j}`
+on `regular grids <https://en.wikipedia.org/wiki/Regular_grid>`_ and
+corresponding coordinate grids :math:`X_{i,j}, Y_{i,j}`.
diff --git a/galleries/plot_types/basic/README.rst b/galleries/plot_types/basic/README.rst
@@ -1,6 +1,7 @@
 .. _basic_plots:
 
-Basic
------
+Pairwise data
+-------------
 
-Basic plot types, usually y versus x.
+Plots of pairwise :math:`(x, y)`, tabular :math:`(var\_0, \cdots, var\_n)`,
+and functional :math:`f(x)=y` data.
diff --git a/galleries/plot_types/stats/README.rst b/galleries/plot_types/stats/README.rst
@@ -1,6 +1,7 @@
 .. _stats_plots:
 
-Statistics plots
-----------------
+Statistical distributions
+-------------------------
 
-Plots for statistical analysis.
+Plots of the distribution of at least one variable in a dataset. Some of these
+methods also compute the distributions.
diff --git a/galleries/plot_types/unstructured/README.rst b/galleries/plot_types/unstructured/README.rst
@@ -1,9 +1,7 @@
 .. _unstructured_plots:
 
-Unstructured coordinates
--------------------------
+Irregularly gridded data
+------------------------
 
-Sometimes we collect data ``z`` at coordinates ``(x,y)`` and want to visualize
-as a contour.  Instead of gridding the data and then using
-`~.axes.Axes.contour`, we can use a triangulation algorithm and fill the
-triangles.
+Plots of data :math:`Z_{x, y}` on `unstructured grids <https://en.wikipedia.org/wiki/Unstructured_grid>`_ ,
+unstructured coordinate grids :math:`(x, y)`, and 2D functions :math:`f(x, y) = z`.