%ISMAPPING Test whether the argument is a mapping%% 	N = ISMAPPING(W);%% INPUT% 	W   Input argument%% OUTPUT% 	N   1/0 if W is/isn't a mapping object%% DESCRIPTION% True (1) if W is a mapping object and false (0), otherwise.%% SEE ALSO% ISDATASET, ISFEATIM, ISDATAIM% $Id: ismapping.m,v 1.4 2003/08/09 14:58:17 ela Exp $function n = ismapping(w)	prtrace(mfilename);	n = isa(w,'mapping');	if (nargout == 0) & (n == 0)		error([newline 'Mapping expected.'])	endreturn;