Return the colours used in the package functClust.
fcolours()Return the vector of the colours used in the package functClust.
The vector of colours is
c("red3", "blue2", "orange2", "turquoise3", "magenta", "green4").
The use of functions fsymbols() * fcolours() generates
a vector of 5 * 6 = 30 different symbols,
before to be automatically recycled by R.
fepsilon returns a value for epsilon.
fletters returns a vector of lowercase
then uppercase letters.
fcolours returns a vector of colours.
fsymbols returns a vector of symbols.