GIMPULSE

Purpose:

Generates an impulse with an optional spacing and delay.

Syntax:

GIMPULSE(N, spacing, offset)

N

-

An integer, the number of points to generate.

spacing

-

A real, the spacing (delta x) between points.

offset

-

Optional. A real, the location of the impulse. Defaults to 0.0.

Returns:

A series.

Example:

W1: gimpulse(100)

 

creates a 100-point impulse with a spacing of 1.0 such that W1[1] == 1 and W1[n] == 0 for 1 < n <= 100

 

W1: gsin(200, .01, 1)

W2: gimpulse(200, .01)

W3: gimpulse(200, .01, .5)

W4: conv(W1, W2)

W5: conv(W1, W3)

 

image\gimpulsepic.gif

 

W1 contains 200 samples of a 1 Hertz sinewave sampled at 100 samples per second.

 

W2 contains a 200 point impulse and W3 contains the same impulse delayed by 0.5 seconds.

 

W4 and W5 demonstrate the delay effect by convolving the sinewave with each impulse.

Remarks:

Unlike IMPULSE, GIMPULSE generates an impulse with a given DELTAX and DELAY.

 

If specified, 0.0 <= offset < length * deltax.

 

See IMPZ to calculate the impulse response of a Z-transform.

See Also:

EXTRACT

IMPULSE

IMPZ

ONES