I want to plot data using a paleo time scale : time is decreasing from a positive value to zero (present day).
The following script gives more details :
! Model Years are from 2000 to 7999, which correspond to nothing :-(
! I can define a time axis starting at 1, which it's less confusing
LET nt = `t2m_yearmean,RETURN=lsize`
DEFINE AXIS/T=1:`nt`:1/UNITS="Years" YearFromStart
! But the labelling I want is Year before present (present being 1850)
LET/TITLE="Years BP" YearBP=6000-T[GT=YearFromStart]+1
! I can not define the following axis because it's reversed
!DEFINE AXIS/T/UNITS="Years"/NAME="YearBP" YearBP
LET t2m = t2m_yearmean[GT=YearFromStart@ASN]-273.15
! How can I use YearBP as an axis to have proper labelling
! of the time axis on the following plot ?
Any idea ?