need a matlab program for the magnitude response of comb filter

merlin john said:

i need a program for magnitude response of comb filter...
example is given below

% Implementing Cascaded Integrator Comb filter with the
% comb section following the integrator stage
N = 10;
delayBuffer = zeros(1,N);
intOut = 0;
xn = sin(2*pi*[0:.1:10]);
for ii = 1:length(xn)
% comb section
combOut = xn(ii) – delayBuffer(end);
delayBuffer(2:end) = delayBuffer(1:end-1);
delayBuffer(1) = xn(ii);

% integrator
intOut = intOut + combOut;
y2n(ii) = intOut;
end

err12 = y1n(1:length(xn)) – y2n;
err12dB = 10*log10(err12*err12′/length(err12)) % identical outputs
close all

% Implementing Cascaded Integrator Comb filter with the
% integrator section following the comb stage

N = 10;
delayBuffer = zeros(1,N);
intOut = 0;
xn = sin(2*pi*[0:.1:10]);
for ii = 1:length(xn)
% integrator
intOut = intOut + xn(ii);

% comb section
combOut = intOut – delayBuffer(end);
delayBuffer(2:end) = delayBuffer(1:end-1);
delayBuffer(1) = intOut;
y3n(ii) = combOut;

end
err13 = y1n(1:length(xn)) – y3n;
err13dB = 10*log10(err13*err13′/length(err13)) % identical outputs

but i dint understand what they are saying here.
i couldn't copy the image here.
you can find it in google
thanks in advance

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