function y = DoubleMe(x)
% DoubleMe - double the value of the input
%
% This function doubles the value of its input. The input
% may be a scalar, vector, or matrix and the result will
% be of the same dimension as the input.
%
% Syntax:
%   y = DoubleMe(x)
%

% Author: BPP
% Date: 9/30/02

% Check inputs
if nargin ~=1
    error('Function DoubleMe requires exactly one input.');
end
if nargout > 1
    error ('Function DoubleMe can have at most one output argument.');
end

% Compute result
y = 2*x;