This function transforms the current numeric vector or
set into a "simplified black and white image" of this same data set: every
value of disease intensity below and above a given threshold is given the
value 0 and 1, respectively.
threshold(data, value, ...)
A numeric vector or an
All the intensity values lower or equal to this value are set to 0. The other values are set to 1.
Additional arguments to be passed to other methods.
By default, everything above 0 is given 1, and 0 stays at 0.
is thus useful to report a whole sampling unit as "healthy" (0), if no
diseased individual at all was found within the sampling unit, or "diseased"
(1) if at least one diseased individual was found.