[R] Gasoline Data in pls package

[Ravi Ramaswamy]

Hi -

I am using pls package for some pcr computations. There is a data set called
gasoline.

Would someone be able to tell me what command(s) could be used to produce
this graph in R?  I am not sure where the log(1/R) - Y-axis - are coming
from

Thanks much

Ravi