[yt-users] create_profile of linear fields

[Nathan Goldbaum]

What happens if you use the 'logs' keyword for create_profile to control
the logging for temperature, velocity_magnitude, and dx?

On Fri, Oct 31, 2014 at 2:08 PM, Douglas Harvey Rudd <drudd at uchicago.edu>
wrote:

> Hi all,
>
> Is there a way to specify the log/non-log scaling of a y-axis variable in
> create_profile or ProfilePlot.from_profiles?  I have some profiles that
> start flat at an initial time and so the velocity_magnitude is everywhere
> 0.  create_profile succeeds, but ProfilePlot.from_profiles generates a
> Matplotlib error before I have the ability to specify a scaling:
>
>     sph = ds.sphere(ds.domain_center, ds.domain_width[0]/2)
>     profile = yt.create_profile(sph, "radius",
>                                 ["density", "temperature",
> "velocity_magnitude", "dx"],
>
> extrema={'radius':(ds.domain_width[0]/ds.num_grid,ds.domain_width[0]/2.)},
>
> n_bins=int(ds.domain_width[0]*2.**(ds.max_level-1)),
>                                 logs={'radius':False},
>                                 units={'radius':'pc'})
>     plot = yt.ProfilePlot.from_profiles(profile)
>
> Relevant part of the dump:
> /software/python-2.7-2014q3-el6-x86_64/lib/python2.7/site-packages/matplotlib-1.4.0-py2.7-linux-x86_64.egg/matplotlib/ticker.pyc
> in view_limits(self, vmin, vmax)
>    1523         if minpos <= 0 or not np.isfinite(minpos):
>    1524             raise ValueError(
> -> 1525                 "Data has no positive values, and therefore can
> not be "
>    1526                 "log-scaled.")
>    1527
>
>
> Douglas Rudd
> Scientific Computing Consultant
> Research Computing Center
> drudd at uchicago.edu
>
>
>
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