Dear YT people,

I need to do integration of density field along line of sight. I know the ProjectionPlot function plots the integration of a field along line of sight. 

yt.ProjectionPlot(ds, 'z', 'density, center= 'm')

However, I was wondering if it is possible to get the projection as an array (or new field) , so that I can make a ProfilePlot  of the integrated field along line of sight and another field ('Mass')

In other words, I want to do the following:

sp = ds.sphere("max", (200, "kpc"))
proj = yt.ProfilePlot(sp, 'Integrated_Density_along_Line_Of_Sight', 'Mass)