Hello, I have been trying to overplot contour of [Fe/H] on top of a projected density plot, but I get strange errors (apparently due to unit mismatch). I was wondering if there is a way to do this. All I need is to divide projected metal density by projected density, save it, and plot its contour. How do you do this with YT? Thank you very much! -- Mohammadtaher Safarzadeh, Ph.D. http://www.mtsafarzadeh.com