length of unit (or x and y units) of symbol coordinates in cm.
relsysize
same, as a proportion of the plotting area.
Value
A numeric 2x2 matrix, with rows named x and y, and
columns, named "sy2usr" and "usr2cm" which give the
scale conversion factors from ‘symbol’ (as given) to
‘usr’ coordinates and from these to ‘cm’, respectively.
See Also
par("usr"), of also ("pin") on which this
is based.