Re: [Visualpython-users] can't understand arange() behavior

[Gary P. <gar...@gm...>]

On Sun, Mar 30, 2008 at 4:42 PM,  <bre...@un...> wrote:
>
> scipy.linspace does the same job as arange, but behaves correctly in all
> circumstances

Brief detail:  scipy.linspace points to the same function as
numpy.linspace, and numpy has less overhead than scipy.     Also, the
syntax of linspace is not the same as the syntax of arange.

(While I'm at it, for those familiar with matplotlib,  pylab.linspace
behaves differently than numpy.linspace, unfortunately.)


>
>
>
>
>
>  "Gary Pajer" <gar...@gm...>
> Sent by: vis...@li...
>
> 31/03/2008 06:40 AM
>
> To
> "Joe Heafner" <hea...@gm...>
>
> cc VPython List <vis...@li...>
>
> Subject Re: [Visualpython-users] can't understand arange() behavior
>
>
>
>
>
>
> In [1]: 3 * 0.1
>  Out[1]: 0.30000000000000004
>
>  I.e.,  3 * 0.1 > 0.3
>
>  The floating point gotcha, yet again.
>
>  -g
>
>  On Sat, Mar 29, 2008 at 11:13 PM, Joe Heafner <hea...@gm...> wrote:
>  > When I type arange(1, 3, 1) I get [1, 2] as expected. When I type
>  > arange(0.1, 0.3, 0.1) I get [0.1, 0.2] as expected. But when I type
>  > arange(0.1, 3*0.1, 0.1) I get [0.1, 0.2, 0.3], which is not what would
>  > expect. I can't find this behavior documented anywhere. What's going on?
>  >
>  > Joe
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