RMS and named subscripting

Hi.
I want to compute the temporal root-mean-square-difference at each
latitude/longitude grid point and I know that I have to follow the NCL's
named subscripting to reorder the input array such that "time" is the
rightmost dimension, such that
rmsdTime = dim_rmsd( x(lat|:,lon|:,time|:), y(lat|:,lon|:,time|:) )

But my two variables are:

Variable: V925
Type: float
Total Size: 3636240 bytes
            909060 values
Number of Dimensions: 3
Dimensions and sizes: [60] x [109] x [139]
Coordinates:
Number Of Attributes: 4
  PlotLevelID : 925 hPa
  units : m/s
  description : v Velocity
  _FillValue : -999999

Variable: FNLv925
Type: float
Total Size: 3636240 bytes
            909060 values
Number of Dimensions: 3
Dimensions and sizes: [60] x [south_north_stag | 109] x [west_east | 139]
Coordinates:
Number Of Attributes: 6
  stagger : V
  description : V
  units : m s-1
  MemoryOrder : XYZ
  FieldType : 104
  _FillValue : -999

Since, FNLv925's dimensions have names and V925's dimensions do not, in
order to root-mean-square-difference at each latitude/longitude grid point,
do I need to add extra dimension names to V925?
Thank you.
-Erik

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Received on Wed Feb 06 2008 - 20:41:19 MST