[yt-users] Plotting SFRs

[Stephanie Tonnesen]

I am not sure, but the first thing I would do would be to add

from yt.units import Mpccm

At the top and see what happens next.

Best,
Stephanie

On Tue, Sep 12, 2017 at 11:36 AM Ashley Jarvis <ajarvis at star.sr.bham.ac.uk>
wrote:

> Hi all,
>
> I’m attempting to adapt the example script for plotting star formation
> rates (found at
> http://yt-project.org/doc/analyzing/analysis_modules/star_analysis.html#star-formation-rate)
> to work with output data from a simulation run using Enzo. However, when I
> attempt to run the script, I get the following error:
>
> ———————————————————
>
> File "PlotSFR.py", line 26, in <module>
>     sfr = StarFormationRate(data, star_mass=mass_old,
> star_creation_time=ct_old, volume=sp.volume())
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/analysis_modules/star_analysis/sfr_spectrum.py",
> line 115, in __init__
>     self._ds.quan(1.0, 'Mpccm**3').units
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/yt_array.py",
> line 1355, in __new__
>     dtype=dtype, bypass_validation=bypass_validation)
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/yt_array.py",
> line 430, in __new__
>     units = Unit(input_units, registry=registry)
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py",
> line 257, in __new__
>     unit_data = _get_unit_data_from_expr(unit_expr, registry.lut)
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py",
> line 572, in _get_unit_data_from_expr
>     unit_data = _get_unit_data_from_expr(unit_expr.args[0],
> unit_symbol_lut)
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py",
> line 566, in _get_unit_data_from_expr
>     return _lookup_unit_symbol(str(unit_expr), unit_symbol_lut)
>   File
> "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py",
> line 657, in _lookup_unit_symbol
>     "symbols." % symbol_str)
> yt.units.unit_registry.UnitParseError: Could not find unit symbol 'Mpccm'
> in the provided symbols.
>
> ———————————————————
>
> I am using version 3.3.5 of yt.
>
> Does anyone know how I can resolve this? Any suggestions would be greatly
> appreciated.
>
> Thanks,
> Ashley
>
>
>
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>
-- 
--
Dr. Stephanie Tonnesen
Alvin E. Nashman Postdoctoral Fellow
Carnegie Observatories, Pasadena, CA
stonnes at gmail.com
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