Many thanks Andrew, that worked very well !! I was not setting the "region" properly. Regards, Shankar On Thu, Aug 6, 2015 at 7:08 PM, Andrew Myers <atmyers2@gmail.com> wrote:

Hi Shankar,

Yes, that is possible. I think your second example should work, but it's hard to tell without seeing the complete script. This script works for me: http://paste.yt-project.org/show/5797/

Could you try following that and see if it solves your problem?

Best, Andrew

On Thu, Aug 6, 2015 at 6:38 AM, Shankar Agarwal <agarwalshankar@gmail.com> wrote:

...

Hi,

http://yt-project.org/doc/cookbook/complex_plots.html#thin-slice-projections

Is it possible to create a thin slice projection of particles (instead of density)?

I tried the following three methods but get errors:

1. p = yt.ParticlePlot(ds, 2, ['particle_mass'], data_source=region)

TypeError: __init__() got multiple values for keyword argument 'data_source'

2. p = yt.ParticleProjectionPlot(ds, 2, ['particle_mass'], data_source=region)

finfo = self.ds._get_field_info("unknown", fname)

3. p = yt.ProjectionPlot(ds, 2, ['particle_mass'], data_source=region)

File "/home/sagarwal/codes/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.py", line 1429, in __init__ field_parameters = field_parameters, method = method) File "/home/sagarwal/codes/yt/yt-x86_64/src/yt-hg/yt/data_objects/construction_data_containers.py", line 253, in __init__ field = self._determine_fields(ensure_list(field)) File "/home/sagarwal/codes/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 518, in _determine_fields finfo = self.ds._get_field_info("unknown", fname)

Shankar

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