【已解决】NCL脚本的参数传递

When used in conjunction with an NCL script, command line arguments can set a variable’s value, help determine initial conditions, and so forth:

% cat modelRun.ncl
begin
  [...]

  if (.not. isvar("nyrStrt")) then      ; is nyrStrt on command line?
      nyrSrt = 1960
  end if

  if (.not. isvar("nyrLast")) then      ; is nyrLast on command line?
      nyrLast = 2002;
  end if

  print(nyrStrt)                        ; for illustrative purposes
  print(nyrLast)

  [...]
end

(Variables nyrStrt and nyrLast are set on the command line)

% ncl nyrStrt=1900 nyrLast=1968 modelRun.ncl

Variable: nyrStrt
Type: integer
Total Size: 4 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes:   [1]
Coordinates: 
(0)     1900


Variable: nyrStrt
Type: integer
Total Size: 4 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes:   [1]
Coordinates: 
(0)     1968

Consider the following

ncl nyrStrt=1930 'fName="Model*"' gravity=9.8 opt=True cyclic=False latS=-30 latN=30 lonL=130 lonR=290 modelRun.ncl

When the number of CLOs is large, it might be clearer to enter only one or two per line. The Unix line continuation character, </b>, can be used to accomplish this:

 ncl nyrStrt=1930      \ 
     'fName="Model*"'  \
     gravity=9.8       \
     latS=-30 latN=30  \
     lonL=130 lonR=290 \
     modelRun.ncl