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Name: PGERRY

Purpose: vertical error bar

Category: GRAPHICS

File: pgplot.src

Author: T.J. Pearson

Use: see description below.

Description:

SUBROUTINE PGERRY (N, X, Y1, Y2, T)
INTEGER N
REAL X(*), Y1(*), Y2(*)
REAL T

Plot vertical error bars.
This routine draws an error bar only; to mark the data point in
the middle of the error bar, an additional call to PGPT or
PGERRX is required.

Arguments:
N (input) : number of error bars to plot.
X (input) : world x-coordinates of the data.
Y1 (input) : world y-coordinates of top end of the
error bars.
Y2 (input) : world y-coordinates of bottom end of the
error bars.
T (input) : length of terminals to be drawn at the ends
of the error bar, as a multiple of the default
length; if T = 0.0, no terminals will be drawn.

Note: the dimension of arrays X, Y1, and Y2 must be greater
than or equal to N. If N is 1, X, Y1, and Y2 may be scalar
variables or expressions, eg:
CALL PGERRY(1,X,Y+SIGMA,Y-SIGMA)

Updates: Oct 16, 1998: JPT automatically extracted from source.