DENSITY-class: DENSITY class definition
In tchitchek-lab/CytoCompare: Computational comparisons of cytometry profiles

DENSITY is a S4 object used to stores a marker expression density.

This object mainly stores for each marker: the bin characteristics, the negative and positive marker densities values, and the number of cells used in the density estimation. Densities are stored using two numeric vectors: 'values.neg' for the negative densities and 'values.pos' for the positive densities. This strategy allows to compute and store densities without defining an absolute minimal value or an absolute maximal value.

name: a character indicating the internal name of the CELL object
bin.interval: a numeric vector of two values specifying the density boundaries
bin.nb: a numeric vector of two values specifying the numbers of negative and positive bins
values.pos: a numeric vector containing the positive density bins
values.neg: a numeric vector containing the negative density bins
point.nb: a numeric value indicating the number of point used to compute the expression density
bin.width: a numeric value indicating the width of the bins used in the density estimation