! jnl file that uses Aviso data to make different altimetric height line plots
! requires input arguments for time range and lat/lon range

! to run the program in ferret, you will need to type the following line with the various values filled in:

!  go fer_alt_ht_line type_plot time_start time_end lat_min lat_max lon_min lon_max

! If you choose not to give values for the various variables, default ones will be substituted for you.
! If you only want to choose some values, you can, but you cannot skip any values.  This means you can 
! fill in the first 2 and no others, or if you want to specify the lat/lon ranges, you must fill in values
! for the first 2 variables as well as the lat/lon ranges.

! type means T vs. time(1), T vs. latitude (2), or T vs. longitude (3)
! depth values are entered in the range of 0 - 2000dbar
! time values are entered corresponding to monthly values starting with Jan, 2004 
! if no values are entered, the default region is 50S to 25N and 130E to 250E with an average over the 
! entire depth and time region
cancel/all data
cancel/all var
cancel/all sym
set window/clear
go set_pixel_size 1024 768
set mem/size=80

! assigning variables to arguments passed in the go command as well as default values
let lat_min=`$4%-50%`
let lat_max=`$5%25%`
let lon_min=`$6%100%`
let lon_max=`$7%-110%`
let time_start=`$2%25%`
let time_end=`$3%48%`
let type_plot=`$1%1%`
set mode interpolate
set region/y=`lat_min`:`lat_max`/x=`lon_min`:`lon_max`
define viewport/xlim=.0,.95/ylim=0,1 top

PPL DFLTFNT DR
ppl conpre @P1@DR
ppl axlsze 0.15,.15
ppl axset 1,1,1,1
ppl pen 0,7
ppl pen 1,7
ppl labset .15,.15,.15

! Ensuring longitudes are properly plotted
let boundb=if (`lon_min`) gt (`lon_max`) then 1 else 0
if `boundb` then
let lon_max=`lon_max`+360
endif

use aviso_grid.nc

! only lat is the same
let a=if (`lat_min`) eq (`lat_max`) and (`lon_min`) ne (`lon_max`) and `time_start` ne `time_end` then 1 else 0
! only lon is the same
let b=if (`lon_min`) eq (`lon_max`) and (`lat_min`) ne (`lat_max`) and `time_start` ne `time_end` then 1 else 0
! only time is the same
let c=if (`lon_min`) ne (`lon_max`) and (`time_start`) eq (`time_end`) and (`lat_min`) ne (`lat_max`) then 1 else 0
! lat and lon are the same, time is different
let d=if (`lon_min`) eq (`lon_max`) and (`lat_min`) eq (`lat_max`) and `time_start` ne `time_end` then 1 else 0
! lat, lon and time are different
let e=if (`lon_min`) ne (`lon_max`) and (`lat_min`) ne (`lat_max`) and `time_start` ne `time_end` then 1 else 0
! lon and time are the same, lat is different
let f=if (`lon_min`) eq (`lon_max`) and (`time_start`) eq (`time_end`) and (`lat_min`) ne (`lat_max`) then 1 else 0
! lat and time are the same, lon is different
let g=if (`lat_min`) eq (`lat_max`) and (`time_start`) eq `time_end` and (`lon_min`) ne (`lon_max`) then 1 else 0

! type 1 plot - line of T vs. time
let ltime=if `type_plot` eq 1 then 1 else 0
if `ltime` then say aviso vs time


! only lat is the same
if `a` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`@ave,y=`lat_min`,l=`time_start`:`time_end`]
endif 
! only lon is the same
if `b` then 
let aviso_plot= aviso[x=`lon_min`,y=`lat_min`:`lat_max`@ave,l=`time_start`:`time_end`]
endif
! lat and lon are the same
if `d` then 
let aviso_plot= aviso[x=`lon_min`,y=`lat_min`,l=`time_start`:`time_end`] 
endif
! lat, lon and time are different
if `e` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`@ave,y=`lat_min`:`lat_max`@ave,l=`time_start`:`time_end`] 
endif

if `ltime` then 
plot/nolab/line=13/set aviso_plot
ppl ylab Aviso Altimetric height (cm)
ppl axlabp -1,-1
ppl labset 0.15 0.15 0.15 0.15
ppl axlsze,0.15,0.15
ppl plot
ppl origin ,($orig_yorg)	!restore y origin
endif


! type 2 plot - line of T vs. latitude
let llat=if `type_plot` eq 2 then 1 else 0
if `llat` then say aviso vs. latitude
if `llat` then


! only lon is the same
if `b` then 
let aviso_plot= aviso[x=`lon_min`,y=`lat_min`:`lat_max`,l=`time_start`:`time_end`@ave]
endif
! all are different
if `e` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`@ave,y=`lat_min`:`lat_max`,l=`time_start`:`time_end`@ave] 
endif
! time is the same
if `c` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`@ave,y=`lat_min`:`lat_max`,l=`time_start`] 
endif
! lon and time are the same
if `f` then 
let aviso_plot= aviso[x=`lon_min`,y=`lat_min`:`lat_max`,l=`time_start`] 
endif
endif


if `llat` then
plot/nolab/line=13/set aviso_plot
ppl ylab Aviso Altimetric height (cm)
ppl axlabp -1,-1
ppl labset 0.15 0.15 0.15 0.15
ppl axlsze,0.15,0.15
ppl plot
ppl origin ,($orig_yorg)	!restore y origin
endif

! type 3 plot - line of T vs. longitude
let llon=if `type_plot` eq 3 then 1 else 0
if `llon` then say aviso vs. longitude
if `llon` then
! only lat is the same
if `a` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`,y=`lat_min`,l=`time_start`:`time_end`@ave]
endif
! time and lat are the same
if `g` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`,y=`lat_min`,l=`time_start`] 
endif
! all three are different
if `e` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`,y=`lat_min`:`lat_max`@ave,l=`time_start`:`time_end`@ave] 
endif
! time is the same
if `c` then 
let aviso_plot= aviso[x=`lon_min`:`lon_max`,y=`lat_min`:`lat_max`@ave,l=`time_start`] 
endif



!let m= `llon` eq 1 and `b` ne 1
!if `m` then
if `llon` then
plot/nolab/line=13/set aviso_plot
ppl ylab Aviso Altimetric height (cm)
ppl axlabp -1,-1 
ppl labset 0.15 0.15 0.15 0.15
ppl axlsze,0.15,0.15
ppl plot
ppl origin ,($orig_yorg)	!restore y origin
endif