Set figsize to consistent 8 by 8 inches, and dpi to 100

This reduces some plot resolutions to make them a bit smaller. 100
dpi is the matplotlib default.

src/CSET/operators/plot.py

@@ -200,7 +200,7 @@ def _plot_and_save_contour_plot(
 
     """
     # Setup plot details, size, resolution, etc.
-    fig = plt.figure(figsize=(15, 15), facecolor="w", edgecolor="k")
+    fig = plt.figure(figsize=(8, 8), facecolor="w", edgecolor="k")
 
     # Specify the color bar
     cmap, levels, norm = _colorbar_map_levels(cube.name())
@@ -248,7 +248,7 @@ def _plot_and_save_contour_plot(
     cbar.set_label(label=f"{cube.name()} ({cube.units})", size=20)
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved contour plot to %s", filename)
     plt.close(fig)
 
@@ -279,7 +279,7 @@ def _plot_and_save_postage_stamp_contour_plot(
     # Use the smallest square grid that will fit the members.
     grid_size = int(math.ceil(math.sqrt(len(cube.coord(stamp_coordinate).points))))
 
-    fig = plt.figure(figsize=(10, 10))
+    fig = plt.figure(figsize=(8, 8))
 
     # Specify the color bar
     cmap, levels, norm = _colorbar_map_levels(cube.name())
@@ -311,7 +311,7 @@ def _plot_and_save_postage_stamp_contour_plot(
     # Overall figure title.
     fig.suptitle(title)
 
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved contour postage stamp plot to %s", filename)
     plt.close(fig)
 
@@ -335,7 +335,7 @@ def _plot_and_save_pcolormesh_plot(
 
     """
     # Setup plot details, size, resolution, etc.
-    fig = plt.figure(figsize=(15, 15), facecolor="w", edgecolor="k")
+    fig = plt.figure(figsize=(8, 8), facecolor="w", edgecolor="k")
 
     # Specify the color bar
     cmap, levels, norm = _colorbar_map_levels(cube.name())
@@ -383,7 +383,7 @@ def _plot_and_save_pcolormesh_plot(
     cbar.set_label(label=f"{cube.name()} ({cube.units})", size=20)
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved contour plot to %s", filename)
     plt.close(fig)
 
@@ -414,7 +414,7 @@ def _plot_and_save_postage_stamp_pcolormesh_plot(
     # Use the smallest square grid that will fit the members.
     grid_size = int(math.ceil(math.sqrt(len(cube.coord(stamp_coordinate).points))))
 
-    fig = plt.figure(figsize=(10, 10))
+    fig = plt.figure(figsize=(8, 8))
 
     # Specify the color bar
     cmap, levels, norm = _colorbar_map_levels(cube.name())
@@ -446,7 +446,7 @@ def _plot_and_save_postage_stamp_pcolormesh_plot(
     # Overall figure title.
     fig.suptitle(title)
 
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved contour postage stamp plot to %s", filename)
     plt.close(fig)
 
@@ -482,7 +482,7 @@ def _plot_and_save_line_series(
     ax.autoscale()
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -571,7 +571,7 @@ def _plot_and_save_vertical_line_series(
     ax.autoscale()
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -627,7 +627,7 @@ def _plot_and_save_scatter_plot(
     ax.autoscale()
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved scatter plot to %s", filename)
     plt.close(fig)
 
@@ -686,7 +686,7 @@ def _plot_and_save_histogram_series(
     )
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -735,7 +735,7 @@ def _plot_and_save_postage_stamp_histogram_series(
     # Use the smallest square grid that will fit the members.
     grid_size = int(math.ceil(math.sqrt(len(cube.coord(stamp_coordinate).points))))
 
-    fig = plt.figure(figsize=(10, 10), facecolor="w", edgecolor="k")
+    fig = plt.figure(figsize=(8, 8), facecolor="w", edgecolor="k")
     # Make a subplot for each member.
     for member, subplot in zip(
         cube.slices_over(stamp_coordinate), range(1, grid_size**2 + 1), strict=False
@@ -755,7 +755,7 @@ def _plot_and_save_postage_stamp_histogram_series(
     # Overall figure title.
     fig.suptitle(title)
 
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight")
     logging.info("Saved histogram postage stamp plot to %s", filename)
     plt.close(fig)
 
@@ -770,7 +770,7 @@ def _plot_and_save_postage_stamps_in_single_plot_histogram_series(
     histtype: str = "step",
     **kwargs,
 ):
-    fig, ax = plt.subplots(figsize=(10, 10), facecolor="w", edgecolor="k")
+    fig, ax = plt.subplots(figsize=(8, 8), facecolor="w", edgecolor="k")
     ax.set_title(title)
     ax.set_xlim(vmin, vmax)
     ax.set_ylim(0, 1)