% Purpose
%    gets variable information from the data file.
%
% Synopsis
%    mexeps('inqvar',varcode)
%    [sname, lname, frmt, units] = mexeps('inqvar',varcode)
%
% Description
%    It returns the variable information from the data file. The
%    variable is refered to by its variable code, varcode, which
%    must be presented in the current data file.  If no output 
%    argument on the left side, the result will be printed on 
%    screen in form:
%
%       code:short name:long name:format:units
%
%    When there are 4 output arguments on left side, it returns 
%    above information to them (variable code is not included).
%
% Examples
%    Open a data file and get variable information of first variabel.
%
%      currentfile = mexeps('openr','datafile.cdf');
%      var_list = mexeps('varlist');
%      varcode = var_list(1);
%      [sname, lname, frmt, units] = mexeps('inqvar',varcode);
%      ...
%
% See Also
%    varlist, inqcode, inqaxis
%