sawtooth (Signal Processing Toolbox)

Sawtooth or triangle wave generator.

Syntax

x = sawtooth(t)
x = sawtooth(t,width)

Description

sawtooth(t)

generates a sawtooth wave with period 2

for the elements of time vector t. sawtooth(t) is similar to sin(t), but it creates a sawtooth wave with peaks of -1 and 1 instead of a sine wave. The sawtooth wave is defined to be -1 at multiples of 2

and to increase linearly with time with a slope of 1/

at all other times.

sawtooth(t,width)

generates a modified triangle wave where width, a scalar parameter between 0 and 1, determines the fraction between 0 and 2

at which the maximum occurs. The function increases from -1 to 1 on the interval 0 to 2

*width, then decreases linearly from 1 to -1 on the interval 2

*width to 2

. Thus a parameter of 0.5 specifies a standard triangle wave, symmetric about time instant

with peak-to-peak amplitude of 1. sawtooth(t,1) is equivalent to sawtooth(t).

Diagnostics

If the width parameter is not a scalar, sawtooth gives the following error message:

Requires WIDTH parameter to be a scalar.

See Also


`chirp`	Swept-frequency cosine generator.
`cos`	Cosine of vector/matrix elements (see the online MATLAB Function Reference).
`diric`	Dirichlet or periodic sinc function.
`gauspuls`	Gaussian-modulated sinusoidal pulse generator.
`pulstran`	Pulse train generator.
`rectpuls`	Sampled aperiodic rectangle generator.
`sin`	Sine of vector/matrix elements (see the online MATLAB Function Reference).
`sinc`	Sinc or sin(t)/t function.
`square`	Square wave generator.
`tripuls`	Sampled aperiodic triangle generator.

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