about electronic charge density

[Dong]

Hi Matthias and others,

with TOT_DENSITY_CUBE, one can output the total density as a cube
file. I am wondering how to get the density along some direction, e.g.
Fig. 3d in
"Interfacial water: A first principles molecular dynamics study of a
nanoscale water film on salt" THE JOURNAL OF CHEMICAL PHYSICS 130,
234702, 2009. By Li-Min Liu, Matthias Krack and Angelos Michaelides.


Thanks,
Liu