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2 谿瑚襭

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碁Μ 覲 f(x)襯 螳 覃語 譯狩 覃語朱 蠍磯蟇磯. 覘 企 覲螳 る 讌..

ク 蟆 10朱 覦覓誤 螻 20朱 覦覓誤 り . [http]豢豌
#set the sampling frequency 
samplingFrequency = 1000;

#create the indexes to sample at
timeInterval = 1/samplingFrequency;
signalIndex = seq(0, 1, by=timeInterval);

#amplitude of signal 1 
a1 = 2;  

#amplitude of signal 2 
a2 = 3;  

#frequency of signal 1 
f1 = 10; 

#frequency of signal 2
f2 = 20; 

#10 Hz Sine wave with peak amplitude 2
signal1 = a1 * sin(2 * pi * f1 * signalIndex);

#20 Hz Sine wave with peak amplitude 3
signal2 = a2 * sin(2 * pi * f2 * signalIndex);

#input signal is the sum of two signals in this case with frequencies 10 and 20 Hz
inputSignal = signal1 + signal2;
fft02_1.png

譯手鍵 蠏碁襯 豺覃 れ螻 螳蟇磯.
fft01.png

蠍磯郁 企. 一危一 譯手鍵 焔 豢豢 覲伎蟆 碁Μ 覲企. R 蠍磯蓋朱 fft(螻 碁Μ 覲) 襯 螻牛.
fourierComponents = fft(inputSignal);
plot(abs(fourierComponents[1:50]))
fft02.png
10螻 20 蟇郁碓 覲伎手碓. 襾語 ′企.

蠍 蠍郁鍵..
企: : るジ讓曙 襦螻豺 企Ν 譯殊語. 襦螻豺
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