FFT, padding, IFFT and plot in time domain

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Butterflyfish
Butterflyfish 2015-12-31
Hi, I performed an FFT with some zero padding and would like to transform it back to time domain. When I plot the signal it looks wrong. Is it because of the padding used in the FFT? How can I make it right? here is my code for doing the IFFT:
NFFT=4301;
AvIFFT = ifft(FFTavg.dat,NFFT);
plot(real(AvIFFT))
And I get this plot:
Any help would be greatly appreciated! Thank you!

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