Math

Functions
arma_inline double	sp::sinc (double x)
arma_inline arma::vec	sp::sinc (const arma::vec &x)
arma_inline double	sp::besseli0 (double x)
template<typename T >
double	sp::angle (const std::complex< T > &x)
arma_inline arma::vec	sp::angle (const arma::cx_vec &x)
arma_inline arma::mat	sp::angle (const arma::cx_mat &x)
arma_inline arma::vec	sp::unwrap (const arma::vec &x)

Variables
const double	sp::PI = 3.14159265358979323846
const double	sp::PI_2 = 6.28318530717958647692

Detailed Description

Function Documentation

angle() [1/3]

template<typename T >

double sp::angle

(

const std::complex< T > &

x

)

Calculates angle in radians for complex input.

Parameters

x	Complex input value

Definition at line 67 of file base.h.

Referenced by sp::phasez(), and sp::specgram_ph().

angle() [2/3]

arma_inline arma::vec sp::angle

(

const arma::cx_vec &

x

)

Calculates angle in radians for complex input.

Parameters

x	Complex input vector

Definition at line 76 of file base.h.

angle() [3/3]

arma_inline arma::mat sp::angle

(

const arma::cx_mat &

x

)

Calculates angle in radians for complex input.

Parameters

x	Complex input matrix

Definition at line 89 of file base.h.

besseli0()

arma_inline double sp::besseli0

(

double

x

)

Modified first kind bessel function order zero.

See bessel functions on Wikipedia

Parameters

x

Definition at line 51 of file base.h.

Referenced by sp::kaiser().

sinc() [1/2]

arma_inline double sp::sinc

(

double

x

)

A sinc, sin(x)/x, function.

Parameters

x	The angle in radians

Definition at line 21 of file base.h.

Referenced by sp::fd_filter(), sp::fir1(), sp::fir1_bp(), sp::fir1_bs(), sp::fir1_hp(), and sp::sinc().

sinc() [2/2]

arma_inline arma::vec sp::sinc

(

const arma::vec &

x

)

A sinc, sin(x)/x, function.

Parameters

x	The angle in radians

Definition at line 33 of file base.h.

References sp::sinc().

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unwrap()

arma_inline arma::vec sp::unwrap

(

const arma::vec &

x

)

Unwraps the angle vector x, accumulates phase.

Parameters

x	Complex input vector

Definition at line 103 of file base.h.

References sp::PI_2.

Variable Documentation

PI

const double sp::PI = 3.14159265358979323846

... or use arma::datum::pi

Definition at line 14 of file base.h.

Referenced by sp::fir1_bp(), sp::fir1_hp(), and sp::freq().

PI_2

const double sp::PI_2 = 6.28318530717958647692

Definition at line 15 of file base.h.

Referenced by sp::cos_win(), sp::goertzel(), sp::hanning(), and sp::unwrap().