Hi Nathan,

Perfect, thank you! That was the problem.

Cheers,
Sam

On Tue, 30 Oct 2018 at 14:13, Nathan Goldbaum <nathan12343@gmail.com> wrote:
Hi Sam,

This is a new feature in yt 3.5.0, you’ll need to update to be able to use it. Let us know if you have questions about updating.

Nathan

On Tue, Oct 30, 2018 at 2:16 PM Samantha M Benincasa <smbenincasa@ucdavis.edu> wrote:
Hi everyone,

I'm trying to get a halo into a face-on and side-on configuration using sp.quantities.angular_momentum_vector.

Is there a way to do this calculation with only the young stars in the sphere?  The docs suggest that angular_momentum_vector will take a "particle_type" keyword, but my version does not recognize this.

Cheers,
Sam
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