.de BR
.in 0
.in +8n
.ti -5n
..


.Th TRIANGLE
.S2 SUMMARY:
Convolve with unit area triangle

TRIANGLE  [ Half half_width ] [ Width width ]

.S2 INPUT:
Half half-width : the half-width of the isosceles triangle function rounded to the next sample interval.
.BR
Width width : the base width of the isosceles triangle function rounded to the next sample interval.
.S2 DESCRIPTION:
This routine convolves all traces in memory with a unit area isosceles triangular pulse.  This command is equivalent to
.sp
	TRAPEZOID WIDTH half_width 0.0 half_width
.sp
	TRAPEZOID WIDTH width/2 0.0 width/2
.sp
This acts as a lowpass filter.
.sp
If half_width < DELTA, no filtering is done
.S2 EXAMPLES:

.S2 "SEE ALSO":
TRAPEZOID, BOXCAR, RICKER
