IRIS Toolbox Reference Manual

## fft

Discrete Fourier transform of tseries object

#### Syntax

    [y,range,freq,per] = fft(x)
    [y,range,freq,per] = fft(x,range,...)

#### Input arguments

- `x` [ tseries ] - Input tseries object that will be transformed.

- `range` [ numeric | Inf ] - Date range.

#### Output arguments

- `y` [ numeric ] - Fourier transform with data organised in columns.

- `range` [ numeric ] - Actually used date range.

- `freq` [ numeric ] - Frequencies corresponding to FFT vector elements.

- `per` [ numeric ] - Periodicities corresponding to FFT vector elements.

#### Options

- `'full='` [ `true` | `false` ] - Return Fourier transform on the whole interval [0,2*pi]; if false only the interval [0,pi] is returned.

#### Description

#### Example

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IRIS Toolbox. Copyright © 2007—2013 Jaromir Benes.