% Purpose
%    gets axis information from the data file.
%
% Synopsis
%    mexeps('inqaxis',varcode,axid)
%    [ax_code] = mexeps('inqaxis',varcode,axid)
%    [ax_code,name] = mexeps('inqaxis',varcode,axid)
%    [ax_code,name,frmt] = mexeps('inqaxis',varcode,axid)
%    [ax_code,name,frmt,units] = mexeps('inqaxis',varcode,axid)
%    [ax_code,name,frmt,units,type] = mexeps('inqaxis',varcode,axid)
%    [ax_code,name,frmt,units,type,spc] = mexeps('inqaxis',varcode,axid)
%
% Description
%    It returns spacial axis information of a variable from the data
%    file.  The variable is refered to by its variable code, varcode, 
%    which must be presented in the current data file. The axis is 
%    refered to by a number, axid: 1 for x-axis; 2 for y-axis; and 3 
%    for z-axis.  If no output argument, the result will be printed 
%    on screen:
%
%     	axis code : name : format : units : type: spacing
%
%    When there are 1 to 6 output arguments on right side, it returns
%    above information to them depending the number of output arguments.
%
% Examples
%    Open a data file and print all spacial axes information of first
%    variable on screen.
%
%      currentfile = mexeps('openr','datafile.cdf');
%      var_list = mexeps('varlist');
%      varcode = var_list(1); 
%      mexeps('inqaxis',varcode,1)
%      mexeps('inqaxis',varcode,2)
%      mexeps('inqaxis',varcode,3)
%      ...
%
% See Also
%    varlist, inqcode, inqvar
%