[yt-users] log-linear phase plot

[Geoffrey So]

Just wondering, if FieldOne is already logged, do you still want the limits
to encompass 1 to 1e10, have you tried something like (1e9,1e10) ?

From
G.S.

On Fri, Sep 30, 2011 at 2:37 PM, Wolfram Schmidt <
schmidt at astro.physik.uni-goettingen.de> wrote:

>
> Hi everyone,
>
> I defined two fields, say, FieldOne and FieldTwo, to make 2D phase plot.
> FieldOne is logarithmic by default, FieldTwo is linear (i.e., I set
> take_log=False in add_field).
>
> I want to produce a phase plot with logarithmic bins for FieldOne and
> linear bins for FieldTwo, where the range of FieldTwo is [-10,10]
>
> I thought that
>
> pc.add_phase_object(dd, ["FieldOne", "FieldTwo", "CellMass"], weight=None,
> x_bins=100,y_bins=100, \
>                    x_bounds=[1e0,1e10], y_bounds=[-10,10])
>
> might do the job, but  yt returns the error message:
>
> Warning: invalid value encountered in log10
> yt : [ERROR    ] 2011-09-30 16:55:05,610 Your min/max values for x, y have
> given me a nan.
> yt : [ERROR    ] 2011-09-30 16:55:05,610 Usually this means you are asking
> for log, with a zero bound.
> Traceback (most recent call last):
>  File "stability.py", line 352, in <module>
>    x_bounds=[1e0,1e10], y_bounds=[-10,10])
>  File "/nics/e/sw/analysis/yt/2.1/**sles11.1_gnu4.3.4/src/yt-hg/**
> yt/visualization/plot_**collection.py", line 1149, in add_phase_object
>    lazy_reader)
>  File "/nics/e/sw/analysis/yt/2.1/**sles11.1_gnu4.3.4/src/yt-hg/**yt/data_objects/profiles.py",
> line 408, in __init__
>    raise ValueError
> ValueError
>
> It appears that add_phase_object treats FieldTwo logarithmically, although
> it is linear.
>
> So how can I do a log-linear phase plot?
>
> Best,
> Wolfram
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