feat: enforce equal aspect for circular layout #430 (#432)

* feat: enforce equal aspect for circular layout #430

* changed implementation of set_aspect

xgi/drawing/draw.py

@@ -48,6 +48,7 @@ def draw(
     max_order=None,
     node_labels=False,
     hyperedge_labels=False,
+    aspect="equal",
     **kwargs,
 ):
     """Draw hypergraph or simplicial complex.
@@ -110,6 +111,11 @@ def draw(
     hyperedge_labels : bool or dict, optional
         If True, draw ids on the hyperedges. If a dict, must contain (edge_id: label)
         pairs.  By default, False.
+    aspect : {"auto", "equal"} or float, optional
+        Set the aspect ratio of the axes scaling, i.e. y/x-scale. `aspect` is passed 
+        directly to matplotlib's `ax.set_aspect()`. Default is `equal`. See full 
+        description at
+        https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.set_aspect.html
     **kwargs : optional args
         Alternate default values. Values that can be overwritten are the following:
         * min_node_size
@@ -216,6 +222,8 @@ def draw(
     # compute axis limits
     _update_lims(pos, ax)
 
+    ax.set_aspect(aspect, "datalim")
+
     return ax
 
 
@@ -1209,6 +1217,7 @@ def draw_hypergraph_hull(
     node_labels=False,
     hyperedge_labels=False,
     radius=0.05,
+    aspect="equal",
     **kwargs,
 ):
     """Draw hypergraphs displaying the hyperedges of order k>1 as convex hulls
@@ -1273,6 +1282,11 @@ def draw_hypergraph_hull(
         pairs.  By default, False.
     radius : float, optional
         Radius of the convex hull in the vicinity of the nodes, by default 0.05.
+    aspect : {"auto", "equal"} or float, optional
+        Set the aspect ratio of the axes scaling, i.e. y/x-scale. `aspect` is passed 
+        directly to matplotlib's `ax.set_aspect()`. Default is `equal`. See full 
+        description at
+        https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.set_aspect.html
     **kwargs : optional args
         Alternate default values. Values that can be overwritten are the following:
         * min_node_size
@@ -1396,6 +1410,8 @@ def draw_hypergraph_hull(
     # compute axis limits
     _update_lims(pos, ax)
 
+    ax.set_aspect(aspect, "datalim")
+
     return ax