diff --git a/semestralka/1.m b/semestralka/1.m
index 7c61de6..1a3ca05 100644
--- a/semestralka/1.m
+++ b/semestralka/1.m
@@ -9,13 +9,24 @@ data = int16(str2double(nums));
 
 X = DFT_priama(double(data))
 n = length(X)
-freq = (0:n-1)/n
+Fs = 200;
+freq = (0:n-1)*Fs/n
 
 figure;
 plot(double(data));
 figure;
 plot(freq, X)
 figure;
+x = double(data);
+x = x - mean(x);
+plot(x); % centrovane data
+figure;
 plot(freq, abs(X))
 figure;
 plot(freq, angle(X))
+
+magX = abs(X);
+[pks, locs] = findpeaks(magX, 'NPeaks', 6, 'SortStr', 'descend');
+
+f0 = freq(locs);
+disp(f0);