final code for css

semestralka/FIR.m

@@ -0,0 +1,61 @@
+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;
+N = 3000;
+notch_hw = 0.08;
+trans_bw = 0.08;
+f0_sorted = sort(f0_ohranicene);
+F = [];
+A = [];
+prev_end = 0;
+
+for k = 1:length(f0_sorted)
+    f0 = f0_sorted(k);
+    notch_start = (f0 - notch_hw) / (Fs/2);
+    notch_end = (f0 + notch_hw) / (Fs/2);
+    trans_start = max(prev_end + 0.001, (f0 - notch_hw - trans_bw) / (Fs/2));
+    trans_end = (f0 + notch_hw + trans_bw) / (Fs/2);
+    if trans_start > prev_end + 0.001
+        F = [F, prev_end, trans_start];
+        A = [A, 1, 1];
+    end
+    F = [F, notch_start, notch_end];
+    A = [A, 0, 0];
+    prev_end = trans_end;
+end
+
+if prev_end < 1
+    F = [F, prev_end, 1];
+    A = [A, 1, 1];
+end
+
+F = max(0, min(1, F));
+b = firls(N, F, A);
+a = 1;
+
+b = real(b);
+figure;
+zplane(b, a);
+figure;
+freqz(b, a);
+set(gcf, 'Color', 'none');
+set(gca, 'Color', 'none');
+print('-depsc', 'fig1_semD.eps');
+figure;
+freqz(b, a);
+filtered_data = filtfilt(b, a, double(data));
+title('Filtrovaný signál');
+xlabel('Vzorky');
+ylabel('Amplitúda');
+set(gcf, 'Color', 'none');
+set(gca, 'Color', 'none');
+plot(filtered_data);
+print('-depsc', 'fig2_semD.eps');