[yt-users] Log scale

Matthew Turk matthewturk at gmail.com
Thu Jun 9 08:39:34 PDT 2011


Hi Elizabeth,

I think Sam's right, the onyl way to make your entire potential field
positive is to scale it with the Extrema.  But if you just want to
change the linear to log scaling, use p.set_log_field(True).

-Matt

On Thu, Jun 9, 2011 at 8:05 AM, Sam Skillman <samskillman at gmail.com> wrote:
> Hi Elizabeth,
> You should be able to create a derived field
> (http://yt.enzotools.org/doc/advanced/creating_derived_quantities.html) that
> is not negative and then it should show up as logarithmic.  Maybe make an
> PotentialFieldMagnitude quantity using the absolute magnitude or something
> similar.  You may need to specify the take_log=True keyword in the
> add_quantity call, but True should be the default keyword argument.
> Sam
> On Thu, Jun 9, 2011 at 10:57 AM, Elizabeth Tasker <taskere at mcmaster.ca>
> wrote:
>>
>> Hi,
>>
>> I'm doing slices of the potential field:
>>
>> p = pc.add_slice("PotentialField", 2)
>> pc.set_width(10, 'kpc')
>> p.set_zlim(-4500,-2500)
>> p.modify["grids"]()
>>
>> Is there a way to force the scale to the logarithmic like for density
>> slices?
>>
>> thanks,
>>
>> Elizabeth
>> _______________________________________________
>> yt-users mailing list
>> yt-users at lists.spacepope.org
>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>
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