make_cutoffs: Cut-off points for densities and fever
Description
Generate the cutoffs at every change of density in the fever, but
first category is for density 0, and last category if possible have
no subjects with no fever.
Usage
make_cutoffs(v.fever, v.density, add1 = TRUE)
Arguments
v.fever
numeric vector of 0/1 indicating fever or equivalent
v.density
numeric vector of values >= 0 indicating the density
add1
a logical value to indicate the category started with 1 is included