?? interpolation.m
字號:
function interpolation
%program performs multi-stages interpolation on data in a user-specified data file
clear all;
r = [2 1 1]; % decimation factor array for different stages
l = 4; % filter length
alpha = 0.5; % cut-off frequency
in = fopen('decimation.dat','r') ;
[x,count] = fscanf(in,'%g',inf); % data to be decimated
y = x;
fclose(in);
for i=1:length(r)
y = interp(y,r(i),l,alpha);
end
subplot(1,2,1);stem(x);subplot(1,2,2);stem(y);
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