#include Axe3 (Na_2O) (SiO_2) (K_2O) Axe3 /Tbl [ 20.0 25.0 35.0 15.0 50.0 16.5 60.0 5.33 ] def % here I scale to 0..1 instead of 0..100 [ Tbl { 100 div } forall ] Plot