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Ghansham, As near as I might suggest, your wave number axis would probably fall under the description of a "discrete axis." There is a discussion in the most recent CF document here: http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#discrete-axis Regards, Lansing > Actually I dont want to go away from CF conventions. AFAIK wavenumber has > not been yet accepted as a standard dimension. If I am wrong in stating > that just let me know and I will go ahead to do that. I am more than happy > doing that. It reduces the number of variable in my file. > > regards > Ghansham > > > address@hidden> wrote: > > > Ghansham, > > > > I'm afraid that you will not be able to aggregate your variables as you > > are describing using NcML or any of our aggregation tools. Your best > > solution is probably to rewrite the files with the wavenumber dimension > > included from the start. > > > > Regards, > > Lansing Madry > > Unidata > > Boulder, Colorado > > > > > R/Sir > > > > > > I have mulitple variables (3-d namely time, lat, lon) within a single > > > dataset, and I want to join them on fourth dimension wavenumber (to be > > > created in the dataset). Is it possible using NcML or any other solution > > > > > > > > > Ghansham > > > > > > > > > > > > Ticket Details > > =================== > > Ticket ID: YHY-505756 > > Department: Support netCDF Java > > Priority: Critical > > Status: Open > > > > > > Ticket Details =================== Ticket ID: YHY-505756 Department: Support netCDF Java Priority: Critical Status: Open