doc[]
MGAP CPT[Forecast PredErrorVars hindcast_date InputObs CFSv2_AtlPac_sst CrossValHind PearsonR target_date ]
grid: /X (degree_east) ordered (59.5W) to (52.5W) by 0.5 N= 15 pts :grid
grid: /Y (degree_north) ordered (29.25S) to (35.75S) by 0.5 N= 14 pts :grid
grid: /T (months since 01-Jan) ordered (Sep) to (Nov) by 1.0 N= 3 pts :grid
grid: /L (months) ordered (3.0 months) to (4.0 months) N= 2 pts :grid
mean $partialdiff sub X$ [ MGAP CPT InputObs ] [ X Y | T L]

CPTv10+ files for mean $partialdiff sub X$ [ MGAP CPT InputObs ]