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problem calculating ifft/fft

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VGC
VGC 2012-10-20
How to find inverse fourier transform of a column vector ?
Why is ifft(6) =6 and fft(9) =9 in MATLAB ?

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回答（4 个）

Azzi Abdelmalek
Azzi Abdelmalek 2012-10-20
编辑：Azzi Abdelmalek 2012-10-20
X(0)= x[0]*exp(-j*0*0*2*pi/1) % with x(0)=6
what will you find?
If you want fft of vector
v=rand(10,1)
V=fft(v)
VGC
VGC 2012-10-20
Why is the freq. 1 Hz in your 1st line ? And what is the limit of integration??
VGC
VGC 2012-10-20
Pls dispaly ifft of foll column vector
freq[Hz] 1.00E+09 1.02E+09 1.04E+09 1.06E+09 1.08E+09 1.10E+09 1.12E+09 1.14E+09 1.16E+09 1.18E+09 1.20E+09 1.22E+09 1.24E+09 1.26E+09 1.28E+09 1.30E+09 1.32E+09 1.34E+09 1.36E+09 1.38E+09 1.40E+09 1.42E+09 1.44E+09 1.46E+09 1.48E+09 1.50E+09 1.52E+09 1.54E+09 1.56E+09 1.58E+09 1.60E+09 1.62E+09 1.64E+09 1.66E+09 1.68E+09 1.70E+09 1.72E+09 1.74E+09 1.76E+09 1.78E+09 1.80E+09 1.82E+09 1.84E+09 1.86E+09 1.88E+09 1.90E+09 1.92E+09 1.94E+09 1.96E+09 1.98E+09 2.00E+09 2.02E+09 2.04E+09 2.06E+09 2.08E+09 2.10E+09 2.12E+09 2.14E+09 2.16E+09 2.18E+09 2.20E+09 2.22E+09 2.24E+09 2.26E+09 2.28E+09 2.30E+09 2.32E+09 2.34E+09 2.36E+09 2.38E+09 2.40E+09 2.42E+09 2.44E+09 2.46E+09 2.48E+09 2.50E+09 2.52E+09 2.54E+09 2.56E+09 2.58E+09 2.60E+09 2.62E+09 2.64E+09 2.66E+09 2.68E+09 2.70E+09 2.72E+09 2.74E+09 2.76E+09 2.78E+09 2.80E+09 2.82E+09 2.84E+09 2.86E+09 2.88E+09 2.90E+09 2.92E+09 2.94E+09 2.96E+09 2.98E+09 3.00E+09 3.02E+09 3.04E+09 3.06E+09 3.08E+09 3.10E+09 3.12E+09 3.14E+09 3.16E+09 3.18E+09 3.20E+09 3.22E+09 3.24E+09 3.26E+09 3.28E+09 3.30E+09 3.32E+09 3.34E+09 3.36E+09 3.38E+09 3.40E+09 3.42E+09 3.44E+09 3.46E+09 3.48E+09 3.50E+09 3.52E+09 3.54E+09 3.56E+09 3.58E+09 3.60E+09 3.62E+09 3.64E+09 3.66E+09 3.68E+09 3.70E+09 3.72E+09 3.74E+09 3.76E+09 3.78E+09 3.80E+09 3.82E+09 3.84E+09 3.86E+09 3.88E+09 3.90E+09 3.92E+09 3.94E+09 3.96E+09 3.98E+09 4.00E+09 4.02E+09 4.04E+09 4.06E+09 4.08E+09 4.10E+09 4.12E+09 4.14E+09 4.16E+09 4.18E+09 4.20E+09 4.22E+09 4.24E+09 4.26E+09 4.28E+09 4.30E+09 4.32E+09 4.34E+09 4.36E+09 4.38E+09 4.40E+09 4.42E+09 4.44E+09 4.46E+09 4.48E+09 4.50E+09 4.52E+09 4.54E+09 4.56E+09 4.58E+09 4.60E+09 4.62E+09 4.64E+09 4.66E+09 4.68E+09 4.70E+09 4.72E+09 4.74E+09 4.76E+09 4.78E+09 4.80E+09 4.82E+09 4.84E+09 4.86E+09 4.88E+09 4.90E+09 4.92E+09 4.94E+09 4.96E+09 4.98E+09 5.00E+09
VGC
VGC 2012-10-20
is the question incomprehensible??

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