figure representing the observations by a triangle whose color depends on the class of the observation
diacmap(x,col1,col2,startpos,endpos,(labcol1),(labcol2))
a Div structure where the labels x.i are used to identify the observations by their classes
columns of x.d chosen for the abscissa and the ordinate respectively
range within the strings of x.i which identifies the class of each observation
labels of the abscissa and the ordinate respectively