Function File: y = tripuls (t)
Function File: y = tripuls (t, w)
Function File: y = tripuls (t, w, skew)

Generate a triangular pulse over the interval [-w/2,w/2), sampled at times t. This is useful with the function pulstran for generating a series of pulses.

skew is a value between -1 and 1, indicating the relative placement of the peak within the width. -1 indicates that the peak should be at -w/2, and 1 indicates that the peak should be at w/2. The default value is 0.

Example: 

fs = 11025;  # arbitrary sample rate
f0 = 100;    # pulse train sample rate
w = 0.3/f0;  # pulse width 3/10th the distance between pulses
plot (pulstran (0:1/fs:4/f0, 0:1/f0:4/f0, "tripuls", w));

See also: gauspuls, pulstran, rectpuls.

Demonstration 1

The following code

 fs = 11025;  # arbitrary sample rate
 f0 = 100;    # pulse train sample rate
 w = 0.5/f0;  # pulse width 1/10th the distance between pulses
 x = pulstran (0:1/fs:4/f0, 0:1/f0:4/f0, "tripuls", w);
 plot ([0:length(x)-1]*1000/fs, x);
 xlabel ("Time (ms)");
 ylabel ("Amplitude");
 title ("Triangular pulse train of 5 ms pulses at 10 ms intervals");

Produces the following figure

Figure 1

Demonstration 2

The following code

 fs = 11025;  # arbitrary sample rate
 f0 = 100;    # pulse train sample rate
 w = 0.5/f0;  # pulse width 1/10th the distance between pulses
 x = pulstran (0:1/fs:4/f0, 0:1/f0:4/f0, "tripuls", w, -0.5);
 plot ([0:length(x)-1]*1000/fs, x);
 xlabel ("Time (ms)");
 ylabel ("Amplitude");
 title ("Triangular pulse train of 5 ms pulses at 10 ms intervals, skew = -0.5");

Produces the following figure

Figure 1

Package: signal