Python "why" questions

[Robert Kern]

On 8/16/10 9:29 PM, Roy Smith wrote:
> In article<i4cqg0$olf$3 at lust.ihug.co.nz>,
>   Lawrence D'Oliveiro<ldo at geek-central.gen.new_zealand>  wrote:
>
>> In message<roy-EE1B7F.21001716082010 at news.panix.com>, Roy Smith wrote:
>>
>>> 5) real intensity[160.0 : 30.0 : 0.01]
>>
>> How many elements in that array?
>>
>> a) 2999
>> b) 3000
>> c) neither of the above
>
> c) neither of the above.  More specifically, 13,001 (if I counted
> correctly).

13000, actually. Floating point is a bitch.

[~/Movies]
|1> import numpy

[~/Movies]
|2> len(numpy.r_[160.0:30.0:-0.01])
13000

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco