Re: [Matplotlib-users] NaN's and infs

[Darren D. <dd...@co...>]

>
> from the numpy list:
>  > numarray allows one to customize how errors are handled. You can
>  > choose:
>  >
>  > 1) to silently ignore all errors.
>  > 2) print a warning message (default)
>  > 3) raise an exception.
>  >
>  > One may separately set one of these three behaviors for each of
>  > the 4 ieee categories of floating point errors, namely
>  >
>  > 1) invalid results (i.e., NaNs)
>  > 2) divide by zeros (Infs)
>  > 3) overflows
>  > 4) underflows
>
> now try this:
> from numarray import *
> 1./arange(10)
> Warning: Encountered divide by zero(s)  in divide
> array([              inf,   1.00000000e+000,   5.00000000e-001,
>          3.33333333e-001,   2.50000000e-001,   2.00000000e-001,
>          1.66666667e-001,   1.42857143e-001,   1.25000000e-001,
>          1.11111111e-001])
>
>
> there is the inf!!
>

Thank you Flavio,

I had tried the test you just suggested, and only got the warning message. I 
incorrectly assumed that the result had not been returned. Now I see that it 
was returned:

from numarray import *
a=1./arange(10) #displays error
print a              # displays a with the inf

Thanks again,

Darren