Hello, I’ve been working on a project where I created derived fields to represent inflowing and outflowing gas in the galaxy. In doing so, I’ve run into a strange issue where yt wants my derived field for inflowing/outflowing mass (cell mass) to be dimensionless, but it will scale graphs as though the units are grams (original script found here: http://paste.yt-project.org/show/5829/ <http://paste.yt-project.org/show/5829/>). However, this makes it difficult to work with the data, so I’ve tried to give units in the derived field function (g and Msun), but I receive errors similar to this (http://paste.yt-project.org/show/5830/ <http://paste.yt-project.org/show/5830/>). If I try to change the specified unit within the mass function in the script to g or Msun, I receive this error when I try to plot instead (http://paste.yt-project.org/show/5831/ <http://paste.yt-project.org/show/5831/>). I’m working with yt through miniconda, so I have yt version 3.2, no changeset, on a Mac with OS X 10.10.4. Any suggestions? Thank you, Madison Fitzgerald Astrophysics | Lyman Briggs College Women’s & Gender Studies | College of Arts & Letters LGBTQ and Sexuality Studies Specialization Women in Science, President Undergraduate Teaching Assistant Undergraduate Research Assistant Department of Physics and Astronomy Honors College Michigan State University