function ps (args)
                                                                                                                            
expid    = subwrd(args,1)
output   = subwrd(args,2)
debug    = subwrd(args,3)
                                                                                                                            

* Initialize
* ----------
'reinit'
'set display color white'
'set clab off'
'c'

* Get MASS Variable
* -----------------
'getvar MASS AGCM'
        qname.1 = subwrd(result,1)
        qfile.1 = subwrd(result,2)
        scale.1 = subwrd(result,3)
        expdsc  = subwrd(result,4)
    if( qname.1 = 'NULL' )
       'getvar PS DYN'
        qname.1 = subwrd(result,1)
        qfile.1 = subwrd(result,2)
        scale.1 = subwrd(result,3)
        expdsc  = subwrd(result,4)
        if( qname.1 = 'NULL' ) ; return ; endif
    endif

'getvar TQV AGCM'
        qname.2 = subwrd(result,1)
        qfile.2 = subwrd(result,2)
        scale.2 = subwrd(result,3)
    if( qname.2 = 'NULL' ) ; return ; endif

'getvar TQL AGCM'
        qname.3 = subwrd(result,1)
        qfile.3 = subwrd(result,2)
        scale.3 = subwrd(result,3)

'getvar TQI AGCM'
        qname.4 = subwrd(result,1)
        qfile.4 = subwrd(result,2)
        scale.4 = subwrd(result,3)

'getvar TOX AGCM'
        qname.5 = subwrd(result,1)
        qfile.5 = subwrd(result,2)
        scale.5 = subwrd(result,3)

numvar = 5


* Get Environment Variables
* -------------------------
'getenv "GEOSUTIL"'
         geosutil = result
                                                                                                                            

* Experiment Datasets
* -------------------
n = 1
while( n<=numvar )
if( qfile.n != "NULL"  ) ; 'set dfile 'qfile.n ; endif
'setx'
'sety'
'sett'
'set z 1'

if( qname.n = 'MASS' )
   'make_ts -FUNCTION ('qname.n'*9.8)+1 -NAME VAR'n
else
   'make_ts -FUNCTION  'qname.n'        -NAME VAR'n
endif
  newfile = subwrd(result,1)
  kdim    = subwrd(result,2)

n = n+1
endwhile
'set x 1'
'set y 1'
'set z 1'


* Make Plot
* ---------
        flag = ""
while ( flag = "" )
       'run 'geosutil'/plots/tseries/ps_1 'expdsc' 'output
        if( debug = "debug" )
            say "Hit  ENTER  to repeat plot"
            say "Type 'next' for  next plot, 'done' for next field"
                 pull flag
        else
                 flag = "next"
        endif
        'c'
endwhile