semestralka

semestralka/2.m

@@ -0,0 +1,29 @@
+clc;
+close all;
+clear all;
+
+f0_ohranicene = [25, 20, 10, 12.5];
+% semestralka
+rawText = fileread('data6.dat');
+nums = regexp(rawText, '[-+]?\d+', 'match');
+data = int16(str2double(nums));
+
+Fs = 200;
+r = 0.95;
+b = 1;
+a = 1;
+
+for k = 1:length(f0_ohranicene)
+    theta = 2*pi*(f0_ohranicene(k)/Fs);
+    b = conv(b, [1, -2*cos(theta), 1]);
+    a = conv(a, [1, -2*r*cos(theta), r^2]);
+end
+
+figure;
+zplane(b, a);
+figure;
+freqz(b, a);
+figure;
+freqz(b, a);
+filtered_data = filter(b, a, double(data));
+plot(filtered_data);