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[netcdfgroup] eliminate dimension of netcdf variable

Hello all,

I have a bunch (many) of netcdf files which contain a variable defined in four
dimensions, say;

variable(time,depth,y,x)

the dimension of x is 1 so I want (need) to eliminate this dimension so that my
variable is now

variable(time,depth,y)

Any help will be highly appreciated , thanks a lot!