add grid support for "multibar"

src/main.py

@@ -133,6 +133,7 @@ if __name__ == "__main__":
     multi_bar_parser.add_argument("--label", "-l", type=str, help="the measurement label of the multibar plot")
     multi_bar_parser.add_argument("--style", type=str, default="{}", help="specification for the style of the bar plots, in JSON")
     multi_bar_parser.add_argument("--log-scale", action="store_true")
+    multi_bar_parser.add_argument("--grid", action="store_true")
 
     common_options = [
         {
@@ -216,6 +217,7 @@ if __name__ == "__main__":
             plot_layout=plot_layout,
             use_tex=args.use_tex,
             log_scale=args.log_scale,
+            grid=args.grid,
             style=json.loads(args.style),
         )
 

src/multi_bar.py

@@ -84,6 +84,7 @@ def multi_bar(
     plot_layout: str = "constrained",
     use_tex: bool = False,
     log_scale: bool = False,
+    grid: bool = False,
     style: dict = {},
 ) -> matplotlib.figure.Figure:
     if labels_locations is None:
@@ -108,6 +109,8 @@ def multi_bar(
     ax.set_title(title)
     if log_scale:
         ax.set_yscale('log')
+    if grid:
+        ax.yaxis.grid(True, which="major")
     ax.set_xticks(labels_locations + width, groups)
     ax.legend(loc=legend_loc, ncols=nb_legend_cols)