Fix bug in shape assignment

r03ert0 · web-flow · commit 6e9bd810323a · 2021-03-02T11:07:00.000+01:00
shape returns first the y dimension, then the x dimension. The code had the order inverted
diff --git a/lib/matplotlib/streamplot.py b/lib/matplotlib/streamplot.py
@@ -575,7 +575,7 @@ def _integrate_rk12(x0, y0, dmap, f, maxlength):
         dx2 = ds * 0.5 * (k1x + k2x)
         dy2 = ds * 0.5 * (k1y + k2y)
 
-        nx, ny = dmap.grid.shape
+        ny, nx = dmap.grid.shape
         # Error is normalized to the axes coordinates
         error = np.hypot((dx2 - dx1) / (nx - 1), (dy2 - dy1) / (ny - 1))
 
