Sets the number of places after the decimal point in numeric labels.
set
(PLINT, input)
If set is equal to 0
then PLplot automatically determines the number of places to
use after the decimal point in numeric labels (like those used
to label axes). If
set is 1 then
prec sets the number
of places.
prec
(PLINT, input)
The number of characters to draw after the decimal point in
numeric labels.