Fix: Property layer data mapping for both Altair and Matplotlib backends (#2869)

Sahil-Chhoker · web-flow · commit e48c1cd08a84 · 2025-11-05T22:47:22.000+01:00
diff --git a/mesa/visualization/backends/altair_backend.py b/mesa/visualization/backends/altair_backend.py
@@ -388,7 +388,7 @@ def draw_propertylayer(
             df = pd.DataFrame(
                 {
                     "x": np.repeat(np.arange(data.shape[0]), data.shape[1]),
-                    "y": np.tile(np.arange(data.shape[1]), data.shape[0]),
+                    "y": np.tile(np.arange(data.shape[1] - 1, -1, -1), data.shape[0]),
                     "value": data.flatten(),
                 }
             )

Original file line number	Diff line number	Diff line change
`@@ -388,7 +388,7 @@ def draw_propertylayer(`
`388`	`388`	`df = pd.DataFrame(`
`389`	`389`	`{`
`390`	`390`	`"x": np.repeat(np.arange(data.shape[0]), data.shape[1]),`
`391`		`- "y": np.tile(np.arange(data.shape[1]), data.shape[0]),`
	`391`	`+ "y": np.tile(np.arange(data.shape[1] - 1, -1, -1), data.shape[0]),`
`392`	`392`	`"value": data.flatten(),`
`393`	`393`	`}`
`394`	`394`	`)`