From e81b2809e5cbb42266dc41db2f5329c1733fc733 Mon Sep 17 00:00:00 2001 From: Antony Lee Date: Fri, 13 Jan 2017 22:44:53 -0800 Subject: [PATCH] Cast stackplot input to float when required. --- lib/matplotlib/stackplot.py | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/matplotlib/stackplot.py b/lib/matplotlib/stackplot.py index 79153966be27..accbfa97cc81 100644 --- a/lib/matplotlib/stackplot.py +++ b/lib/matplotlib/stackplot.py @@ -68,7 +68,8 @@ def stackplot(axes, x, *args, **kwargs): baseline = kwargs.pop('baseline', 'zero') # Assume data passed has not been 'stacked', so stack it here. - stack = np.cumsum(y, axis=0) + # We'll need a float buffer for the upcoming calculations. + stack = np.cumsum(y, axis=0, dtype=np.promote_types(y.dtype, np.float32)) if baseline == 'zero': first_line = 0. @@ -79,7 +80,7 @@ def stackplot(axes, x, *args, **kwargs): elif baseline == 'wiggle': m = y.shape[0] - first_line = (y * (m - 0.5 - np.arange(0, m)[:, None])).sum(0) + first_line = (y * (m - 0.5 - np.arange(m)[:, None])).sum(0) first_line /= -m stack += first_line pFad - Phonifier reborn

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