Add plot option to transpose layouts

holoviews/plotting/bokeh/plot.py

@@ -361,7 +361,7 @@ def _init_layout(self, layout):
         layout_subplots, layouts, paths = {}, {}, {}
         for r, c in self.coords:
             # Get view at layout position and wrap in AdjointLayout
-            key, view = layout_items.get((r, c), (None, None))
+            key, view = layout_items.get((c, r) if self.transpose else (r, c), (None, None))
             view = view if isinstance(view, AdjointLayout) else AdjointLayout([view])
             layouts[(r, c)] = view
             paths[r, c] = key

holoviews/plotting/mpl/plot.py

@@ -730,7 +730,7 @@ def _compute_gridspec(self, layout):
         col_widthratios, row_heightratios = {}, {}
         for (r, c) in self.coords:
             # Get view at layout position and wrap in AdjointLayout
-            _, view = layout_items.get((r, c), (None, None))
+            _, view = layout_items.get((c, r) if self.transpose else (r, c), (None, None))
             layout_view = view if isinstance(view, AdjointLayout) else AdjointLayout([view])
             layouts[(r, c)] = layout_view
 

holoviews/plotting/plot.py

@@ -1030,6 +1030,9 @@ class GenericLayoutPlot(GenericCompositePlot):
     displays the elements in a cartesian grid in scanline order.
     """
 
+    transpose = param.Boolean(default=False, doc="""
+        Whether to transpose the layout when plotting""")
+
     def __init__(self, layout, **params):
         if not isinstance(layout, (NdLayout, Layout)):
             raise ValueError("GenericLayoutPlot only accepts Layout objects.")
@@ -1038,6 +1041,6 @@ def __init__(self, layout, **params):
 
         super(GenericLayoutPlot, self).__init__(layout, **params)
         self.subplots = {}
-        self.rows, self.cols = layout.shape
+        self.rows, self.cols = layout.shape[::-1] if self.transpose else layout.shape
         self.coords = list(product(range(self.rows),
                                    range(self.cols)))

holoviews/plotting/plotly/plot.py

@@ -66,7 +66,7 @@ def _init_layout(self, layout):
         inserts_cols = []
         for r, c in self.coords:
             # Get view at layout position and wrap in AdjointLayout
-            key, view = layout_items.get((r, c), (None, None))
+            key, view = layout_items.get((c, r) if self.transpose else (r, c), (None, None))
             view = view if isinstance(view, AdjointLayout) else AdjointLayout([view])
             layouts[(r, c)] = view
             paths[r, c] = key