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", dpi=100)
     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", dpi=100)
     logging.info("Saved contour postage stamp plot to %s", filename)
     plt.close(fig)
 
@@ -347,7 +347,7 @@ def _plot_and_save_line_series(
     ax.autoscale()
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight", dpi=100)
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -436,7 +436,7 @@ 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", dpi=100)
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -492,7 +492,7 @@ def _plot_and_save_scatter_plot(
     ax.autoscale()
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight", dpi=100)
     logging.info("Saved scatter plot to %s", filename)
     plt.close(fig)
 
@@ -551,7 +551,7 @@ def _plot_and_save_histogram_series(
     )
 
     # Save plot.
-    fig.savefig(filename, bbox_inches="tight", dpi=150)
+    fig.savefig(filename, bbox_inches="tight", dpi=100)
     logging.info("Saved line plot to %s", filename)
     plt.close(fig)
 
@@ -600,7 +600,7 @@ 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
@@ -620,7 +620,7 @@ 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", dpi=100)
     logging.info("Saved histogram postage stamp plot to %s", filename)
     plt.close(fig)
 
@@ -635,7 +635,7 @@ 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)
@@ -658,7 +658,7 @@ def _plot_and_save_postage_stamps_in_single_plot_histogram_series(
     ax.legend()
 
     # Save the figure to a file
-    plt.savefig(filename)
+    plt.savefig(filename, bbox_inches="tight", dpi=100)
 
     # Close the figure
     plt.close(fig)