[Numpy-discussion] isnan surprise
Keith Goodman
kwgoodman@gmail....
Sun May 25 13:13:15 CDT 2008
>> x = np.array([1.0])
>> np.isnan(x)
array([False], dtype=bool) # <----- Expected
>> np.isnan(x,x)
array([ 0.]) # <----- Surprise (to me)
The same happens with isfinite, isinf, etc.
My use case (self.x is an array):
def isnan(self):
y = self.copy()
np.isnan(y.x, y.x)
return y
Then when I try to do
myobj[myobj.isnan()] = 0
I get (since myobj.isnan() are floats)
IndexError: arrays used as indices must be of integer (or boolean) type
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