[SciPy-user] nice floating point display ?

Stef Mientki s.mientki@ru...
Fri Feb 29 12:51:23 CST 2008


thanks Robert,

Robert Kern wrote:
> On Thu, Feb 28, 2008 at 5:43 PM, Stef Mientki <s.mientki@ru.nl> wrote:
>   
>> hello,
>>
>>  I'm creating an float / log slider,
>>  now I need a nice representation of the min / max / value
>>  of the slider.
>>
>>  For some unknown reason
>>   set_printoptions(precision=2)
>>  doesn't work,
>>  and I doubt if it is adequate in my application,
>>  because precision and notation depends more on the range
>>  than on the actual value itself.
>>
>>  Does anyone has a elegant solution ?
>>     
>
> set_printoptions() doesn't affect Python floats at all, and that looks
> like what you are trying to print.
>
>   
I didn't know that, but it sounds very plausible after all ;-)
> You can explicitly format the numbers yourself:
>
> http://docs.python.org/dev/library/stdtypes.html#string-formatting-operations
>
>
> In [39]: x = 1.2345678901
>
> In [40]: '%f' % x
> Out[40]: '1.234568'
>
>   
Yes that's part of the answer ( I already knew),
but the rest of the problem looks more complicated to me,
(whether I have a range of 1..1000  or 0.0000004 ...0.00000041 etc)
and I think a number of people has already solved this part of the 
problem (like in MatPlotlib).
For now I'm going to for a very simple solution,
let the user specify the format ;-)

cheers,
Stef

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