8000 MAINT: use copy=False in a few astype() calls by argriffing · Pull Request #5909 · numpy/numpy · GitHub
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MAINT: use copy=False in a few astype() calls #5909

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Merged
merged 3 commits into from
May 22, 2015
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MAINT: use copy=False in a few astype() calls #5909

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177067a
MAINT: use copy=False in a few astype calls
alexbrc May 22, 2015
464e767
MAINT: skip copy=False for det and logdet
alexbrc May 22, 2015
1ff2be1
MAINT: conditional copy=False in some astype calls
alexbrc May 22, 2015
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MAINT: conditional copy=False in some astype calls
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@alexbrc
alexbrc committed May 22, 2015
commit 1ff2be174f86ebca2e7a006012bcc5744ace2f6e
20 changes: 16 additions & 4 deletions numpy/linalg/linalg.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@
csingle, cdouble, inexact, complexfloating, newaxis, ravel, all, Inf, dot,
add, multiply, sqrt, maximum, fastCopyAndTranspose, sum, isfinite, size,
finfo, errstate, geterrobj, longdouble, rollaxis, amin, amax, product, abs,
broadcast, atleast_2d, intp, asanyarray
broadcast, atleast_2d, intp, asanyarray, isscalar
)
from numpy.lib import triu, asfarray
from numpy.linalg import lapack_lite, _umath_linalg
Expand Down Expand Up @@ -782,7 +782,7 @@ def qr(a, mode='reduced'):

if mode == 'economic':
if t != result_t :
a = a.astype(result_t)
a = a.astype(result_t, copy=False)
return wrap(a.T)

# generate q from a
Expand Down Expand Up @@ -1696,7 +1696,15 @@ def slogdet(a):
real_t = _realType(result_t)
signature = 'D->Dd' if isComplexType(t) else 'd->dd'
sign, logdet = _umath_linalg.slogdet(a, signature=signature)
return sign.astype(result_t), logdet.astype(real_t)
if isscalar(sign):
sign = sign.astype(result_t)
else:
sign = sign.astype(result_t, copy=False)
if isscalar(logdet):
logdet = logdet.astype(real_t)
else:
logdet = logdet.astype(real_t, copy=False)
return sign, logdet

def det(a):
"""
Expand Down Expand Up @@ -1751,7 +1759,11 @@ def det(a):
t, result_t = _commonType(a)
signature = 'D->D' if isComplexType(t) else 'd->d'
r = _umath_linalg.det(a, signature=signature)
return r.astype(result_t)
if isscalar(r):
r = r.astype(result_t)
else:
r = r.astype(result_t, copy=False)
return r

# Linear Least Squares

Expand Down
0