对于两个相减的变量怎么赋值求解

毛头小和尚

a1 = a->QVAPOR(0,0,:,:)
b1 = b->QVAPOR(0,0,:,:)
  c = b1-a1
; note, in LSM files, it is safer to copy the missing value from the
; file than try to write it out, since the number of decimal points on the
; file may not be the same number NCL reads. (9.99999e29)
; c@_FillValue = a->TAM@missing_value
  ;c@long_name=c@Title                   ; no long_name on this file

c!0="lat"                               ; coordinate vars are called
c!1="lon"                               ; "latitude" etc. plots want "lat"
c&lat  =a->XLAT       ; Create coordinate variables
c&lon  =a->XLONG       ; for sst and store the sizes
  
c@lon2d  = xlong2D
c@lat2d  = xlat2D

lvzl110

你说的赋属性吧，即把QVAPOR的属性赋予C,
如果是的话，可以用一个命令搞定
copy_VarMeta(a,c)