Replace 'argument' by 'parameter' in tutorial 'Plotting Earth relief' (#2063)

Author: yvonnefroehlich

examples/tutorials/advanced/earth_relief.py

@@ -31,7 +31,7 @@
 
 ###############################################################################
 #
-# :meth:`pygmt.Figure.grdimage` can take the optional argument ``projection``
+# :meth:`pygmt.Figure.grdimage` can take the optional parameter ``projection``
 # for the map. In the example below, the ``projection`` is set as ``R12c`` for
 # 12 centimeter figure with a Winkel Tripel projection. For a list of available
 # projections, see :gmt-docs:`cookbook/map-projections.html`.
@@ -44,7 +44,7 @@
 # Set a color map
 # ---------------
 #
-# :meth:`pygmt.Figure.grdimage` takes the ``cmap`` argument to set the CPT of
+# :meth:`pygmt.Figure.grdimage` takes the ``cmap`` parameter to set the CPT of
 # the figure. Examples of common CPTs for Earth relief are shown below.
 # A full list of CPTs can be found at :gmt-docs:`cookbook/cpts.html`.
 
@@ -70,7 +70,7 @@
 #
 # The :meth:`pygmt.Figure.colorbar` method displays the CPT and the associated
 # Z-values of the figure, and by default uses the same CPT set by the ``cmap``
-# argument for :meth:`pygmt.Figure.grdimage`. The ``frame`` argument for
+# parameter for :meth:`pygmt.Figure.grdimage`. The ``frame`` parameter for
 # :meth:`pygmt.Figure.colorbar` can be used to set the axis intervals and
 # labels. A list is used to pass multiple arguments to ``frame``. In the
 # example below, ``a2500`` sets the axis interval to 2,500, ``x+lElevation``
@@ -85,9 +85,9 @@
 # Create a region map
 # -------------------
 #
-# In addition to providing global data, the ``region`` argument for
+# In addition to providing global data, the ``region`` parameter for
 # :meth:`pygmt.datasets.load_earth_relief` can be used to provide data for a
-# specific area. The ``region`` argument is required for resolutions at 5 arc
+# specific area. The ``region`` parameter is required for resolutions at 5 arc
 # minutes or higher, and accepts a list (as in the example below) or a string.
 # The geographic ranges are passed as *xmin*/*xmax*/*ymin*/*ymax*.
 #