GTRIWAVE

Purpose:

Generates a triangular wave in accordance with the specified parameters.

Syntax:

GTRIWAVE(length, spacing, frequency, phase, duty)

length

-

An integer, the length of the output series.

spacing

-

A real, the spacing (delta x) between each point on the x-axis.

frequency

-

Optional. A real, the frequency specified in cycles per second (Hertz). Defaults to 1.

phase

-

Optional. A real, the phase specified in radians. Defaults to 0.

duty

-

Optional. A real, between 0 and 100. The duty cycle, the percentage of a period the triangle wave is "on". Defaults to 100.0.

Returns:

A series.

Example:

gtriwave(100, 0.1, 2, 5)

 

creates a triangular wave of 100 points spaced 0.1 x-units apart. The series is also be shifted by five x-units (the offset value) on the x-axis. The values of this will vary between 1.0 and zero.

Example:

gtriwave(1000, 1/1000, 20)

 

generates 1000 samples of a 20 Hz triangular wave sampled at 1000 samples/sec.

Example:

gtriwave(1000, 1/1000, 20, 0, 60)

 

same as above except the duty cycle is 60%.

Remarks:

The triangular wave is generated by calculating:

 

image\gsqr01.gif

 

and returns a rising ramp from 0 to 1 where s[n] is positive, and a falling ramp from 1 to 0 where s[n] is negative.

 

See GSAWTOOTH to generate a sawtooth wave.

See Also:

GRTSQR

GSAWTOOTH

GSQRWAVE