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### Note, these are placeholder solutions
# Since this module is meant to offer safety wrappers around some numpy
# functions, if we can't import numpy, then gracefully handle the import error
# and define stubs.
try:
from numpy import amin, amax, mean, median, reshape, asarray, isnan, \
compress, isfinite, where, inf
def _asarray1d(arr):
""" Ensure 1d array for one array.
"""
m = asarray(arr)
if len(m.shape)==0:
m = reshape(m,(1,))
return m
def nanmin(x,axis=-1):
""" Find the minimium over the given axis ignoring nans.
"""
y = where(isnan(x), inf, x)
return amin(y,axis)
def nanmax(x,axis=-1):
""" Find the maximum over the given axis ignoring nans.
"""
y = where(isnan(x), -inf, x)
return amax(-1,axis)
def nanmean(x):
""" Find the mean of x ignoring nans.
fixme: should be fixed to work along an axis.
"""
x = _asarray1d(x).copy()
y = compress(isfinite(x), x)
return mean(y)
def nanmedian(x):
""" Find the median over the given axis ignoring nans.
fixme: should be fixed to work along an axis.
"""
x = _asarray1d(x).copy()
y = compress(isfinite(x), x)
return median(y)
except ImportError:
_asarray1d = nanmin = nanmax = nanmean = nanmedian = None
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