X= peaks, plot(×) X=1: length(peaks); y=peaks, plot(x, y) 10 8 6 0 30 35 45 50x=peaks;plot(x) x=1:length(peaks);y=peaks;plot(x,y) 0 5 10 15 20 25 30 35 40 45 50 -8 -6 -4 -2 0 2 4 6 8 10