Imaginary component of a discrete Fourier Transform (dFT) function.

Note: This item is deprecated and will be removed in a future release.

Syntax

y = DftImag(vec1, vec2)

Argument

Name

Description

vec1

A vector of a real component of time-domain data.

vec2 (optional)

A vector of an imaginary component of time-domain data.

Output

Name

Description

y

A vector of the imaginary components.  It is of same length as vec1.

Example

Given a vector data of the time-domain signal, a vector of the imaginary components of the dFT of the signal is created.

Syntax

y = DftImag(data)

Result

y is a vector of the same length as the data consisting of the imaginary components of the dFT.

Comments

The DftImag function returns the imaginary component of a discrete Fourier Transform (dFT).  The dFT is complex-valued and used to map time-domain data into the frequency domain. vec1 and vec2 are assumed to be evenly sampled.

If only one vector is passed to DftImag, the function returns a regular dFT.

If two vectors are passed to DftImag, a complex dFT is calculated. vec1 and vec2 must have the same number of elements.

See Also:

Dfreq

DftMag

DftPhase

DftReal

Idft