Análisis de Fourier
Produce el análisis de Fourier de un conjunto de datos mediante el cálculo de la transformada de Fourier discreta (TFD) de un vector de números complejos de entrada, utilizando un par algoritmos de transformada de Fourier rápida (TFR).
For more information on Fourier analysis, refer to the corresponding Wikipedia article.
Input range has label: Mark when the first row or column of the input array is actually a label and not part of the data analysis.
Input Range is a 2 x N or N x 2 range representing an array of complex number to be transformed, where N is the length of the array. The array represents the real and imaginary parts of the data.
Opciones:
Inverse: When checked, calculates the inverse Discrete Fourier Transform.
Polar: When checked, the results are in polar coordinates (magnitude, phase).
Minimum magnitude for polar form output (in dB): used only when output is in polar form. All frequency components with magnitude less than this value in decibels will be suppressed with a zero magnitude-phase entry. This is very useful when looking at the magnitude-phase spectrum of a signal because there is always some very tiny amount of rounding error when doing FFT algorithms and results in incorrect non-zero phase for non-existent frequencies. By providing a suitable value to this parameter, these non-existent frequency components can be suppressed.
The source data for this example is the same of the FOURIER function page.
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Transformada de Fourier |
Transformada de Fourier |
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Input data range : $B$6:$C$40 |
Input data range : $B$6:$C$40 |
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Real |
Imaginario |
Magnitud |
Fase |
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17.1775578743134 |
3.88635177703826E-15 |
17.1775578743134 |
2.26245884628906E-16 |
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3.428868795359 |
2.37164790000189 |
4.16915518748944 |
0.605113892937279 |
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-6.80271615433369 |
-15.1345439297576 |
16.5931120359682 |
-1.99322000923881 |
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-1.605447356601 |
-5.08653060378972 |
5.33387802617444 |
-1.87652762269615 |
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|
0.395847917447356 |
-2.41926785527625 |
2.45143886917874 |
-1.40861048708919 |
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-1.49410383304833 |
-2.39148041275 |
2.81984482347817 |
-2.12922380028329 |
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0.87223579298981 |
-1.14394086206797 |
1.43853952829993 |
-0.919353665468368 |
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1.5332458505929 |
0.678159168870983 |
1.6765269746366 |
0.416434654153369 |
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0.450563708411459 |
0.22911248792634 |
0.505470263676592 |
0.470425948779898 |
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0.545106616940358 |
0.411028927740438 |
0.682704916689207 |
0.646077879418302 |
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2.22685996425193 |
-2.43092236748302 |
3.29670879167654 |
-0.829181229907427 |
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-1.61522859107175 |
-2.41682657284899 |
2.90689079338124 |
-2.15994697868441 |
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1.30245078290168 |
1.45443785733126 |
1.95237484175544 |
0.840472341525344 |
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|
1.57930628561185 |
-1.33862736591677 |
2.07029745895472 |
-0.70310180067089 |
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-1.07572227365276 |
-0.921557968003809 |
1.41649126309482 |
-2.43322886402899 |
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-0.055782417923803 |
-1.81336029451831 |
1.81421807837012 |
-1.60154853447151 |
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-0.577666040004067 |
1.38887243891951 |
1.50421564456836 |
1.96495487990047 |
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-0.826878282157686 |
-0.186591000796403 |
0.847669685126376 |
-2.91965280961949 |
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-0.826878282157715 |
0.186591000796416 |
0.847669685126408 |
2.91965280961948 |
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-0.577666040004051 |
-1.38887243891954 |
1.50421564456838 |
-1.96495487990045 |
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-0.055782417923785 |
1.81336029451832 |
1.81421807837012 |
1.6015485344715 |
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-1.07572227365276 |
0.921557968003802 |
1.41649126309482 |
2.433228864029 |
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1.57930628561187 |
1.33862736591678 |
2.07029745895474 |
0.703101800670888 |
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|
1.3024507829017 |
-1.45443785733125 |
1.95237484175543 |
-0.840472341525331 |
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|
-1.61522859107176 |
2.416826572849 |
2.90689079338125 |
2.15994697868441 |
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|
2.22685996425191 |
2.43092236748304 |
3.29670879167653 |
0.829181229907435 |
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|
0.545106616940365 |
-0.411028927740441 |
0.682704916689214 |
-0.646077879418299 |
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|
0.450563708411458 |
-0.229112487926344 |
0.505470263676594 |
-0.470425948779905 |
|
|
1.53324585059292 |
-0.678159168870965 |
1.6765269746366 |
-0.416434654153355 |
|
|
0.872235792989797 |
1.14394086206799 |
1.43853952829994 |
0.919353665468386 |
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|
-1.49410383304834 |
2.39148041275001 |
2.81984482347818 |
2.12922380028329 |
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0.395847917447327 |
2.41926785527626 |
2.45143886917875 |
1.4086104870892 |
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-1.60544735660102 |
5.08653060378972 |
5.33387802617445 |
1.87652762269616 |
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-6.80271615433379 |
15.1345439297575 |
16.5931120359682 |
1.99322000923882 |
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3.42886879535907 |
-2.37164790000194 |
4.16915518748952 |
-0.605113892937279 |
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