[R] Fourier Transfrom (FFT) Example

dotted",lwd = 1) plot(f[1:length(f)/2],(mag^2)[1:length(f)/2],type="l",xlab="Frequency, Hz",ylab="Power, Amp^2",log="xy",ylim=c(10^-6,100)) pref<-20E-6 #pa p<-integrate(func,f[1],f[length(f)/2]) pwrDB<-10*log10(p

Re: [R] Fourier Transform fft help

10 for 10* sin(2*pi*10*t), my magnitudes are much higher. delic wrote: > > I wrote a script that I anticipating seeing a spike at 10Hz with the > function 10* sin(2*pi*10*t). > I can't figure out why my plots do not show spikes at the frequencies I > expect. Am I doing s

[R] Fourier Transform fft help

I wrote a script that I anticipating seeing a spike at 10Hz with the function 10* sin(2*pi*10*t). I can't figure out why my plots do not show spikes at the frequencies I expect. Am I doing something wrong or is my expectations wrong? require(stats) layout(matrix(c(1,2,3), 3, 1, byrow = TRUE))