function y=mvaveragec(x,N)
%MVAVERAGEC signal smoothing through the moving average method.
% Y = MVAVERAGEC(X,N) Quickly smooths the signal X via averaging each
% sampling with the previous and afterwards N samples.
%
% Example:
% t = 2*pi*linspace(-1,1);
% xn = cos(x) + 0.25 - 0.5*rand(size(x));
% xs = mvaveragec(xn,4);
% plot(t,xn,t,xs), legend('noisy','smooth'), axis tight
%
% See also MVAVERAGE2 and MVAVERAGEC
% by Yi Cao
% Cranfield University
% 11-09-2007
% y.cao@cranfield.ac.uk
%
y0=filter(ones(1,2*N+1)/(2*N+1),1,x);
y=x;
y(N+1:end-N)=y0(2*N+1:end);