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| author | Charles Harris <charlesr.harris@gmail.com> | 2016-09-23 18:58:55 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-09-23 18:58:55 -0500 |
| commit | a6574b2f080e4050e4b091fd3fa71be1f377f895 (patch) | |
| tree | a8aa1853c17abb9f757c50561a81a1d3ae60ea29 /numpy/lib | |
| parent | c6185dd350854cd5fc98cbc42e648b57bc670a60 (diff) | |
| parent | 36f88442209e74f0fcb63ec2aa3868b63f7dafb4 (diff) | |
| download | numpy-a6574b2f080e4050e4b091fd3fa71be1f377f895.tar.gz | |
Merge pull request #8087 from hodgka/master
BUG: financial.pmt modifies input #8055
Diffstat (limited to 'numpy/lib')
| -rw-r--r-- | numpy/lib/financial.py | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/numpy/lib/financial.py b/numpy/lib/financial.py index 931b0af56..95942da16 100644 --- a/numpy/lib/financial.py +++ b/numpy/lib/financial.py @@ -210,9 +210,10 @@ def pmt(rate, nper, pv, fv=0, when='end'): (rate, nper, pv, fv, when) = map(np.array, [rate, nper, pv, fv, when]) temp = (1 + rate)**nper mask = (rate == 0.0) - np.copyto(rate, 1.0, where=mask) - z = np.zeros(np.broadcast(rate, nper, pv, fv, when).shape) - fact = np.where(mask != z, nper + z, (1 + rate*when)*(temp - 1)/rate + z) + masked_rate = np.where(mask, 1.0, rate) + z = np.zeros(np.broadcast(masked_rate, nper, pv, fv, when).shape) + fact = np.where(mask != z, nper + z, + (1 + masked_rate*when)*(temp - 1)/masked_rate + z) return -(fv + pv*temp) / fact def nper(rate, pmt, pv, fv=0, when='end'): |