MATLAB Mathematics - SERC - Index of

Introduction
Periodogram
2 x 107 cycles/year
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
The scale in cycles/year is somewhat inconvenient. You can plot in years/cycle
and estimate what one cycle is. For convenience, plot the power versus period
(where period = 1./freq) from 0 to 40 years/cycle:
period = 1./freq;
plot(period,power), axis([0 40 0 2e7]), grid on
ylabel('Power')
xlabel('Period(Years/Cycle)')
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