[ncl-talk] Removing surface dimension to calculate the difference

[S Br]

Hi All,
I have a file with 3 dimensions ([surface | 1] x [latitude | 64] x
[longitude | 128]) and another file with 2 dimensions ([latitude | 64] x
[longitude | 128]).
How can I delete or avoid the 'surface' dimension from first file, so that
I can calculate the difference between the two files.

Thanks.
SB
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