OPLERR

Name

oplerr

Purpose

Overplot data points with accompanying x or y error bars.

Calling Sequence

OPLERR, [ X ,] Y , ERR [, DIR= ] [, PSYM= ] [, SYMSIZE= ] [, COLOR= ]

Inputs

Y = array of Y values.
ERR = array of error bar values.

Optional Input Parameters

X = optional array of X values. The procedure checks whether or not
the third parameter passed is a vector to decide if X was passed.
If not passed, then INDGEN(Y) is assumed.
DIR = direction to put error bar (default = 6)
PSYM = plotting symbol (default = +7)
SYMSIZE = symbol size (default = 1.0)
COLOR = color for the symbols (default = !P.COLOR)

Common Blocks

None.

Side Effects

None.

Restrictions

Arrays must not be of type string. There must be enough points to
plot.

Procedure

A plot of X versus Y with error bars drawn from the point in the
direction specified by DIR. Recognized values for DIR are:
1 X + ERR
2 Y + ERR
3 X - ERR
4 Y - ERR
5 X - ERR and X + ERR
6 Y - ERR and Y + ERR (default)
Plot is written to the output device over any plot already there.

Modification History

William Thompson Applied Research Corporation
July, 1986 8201 Corporate Drive
Landover, MD 20785
Marc Buie Lowell Observatory
1991 October 11
Modified to allow specifying the direction for the error bars.
Change PSYM to a keyword parameter
1992 June 24, Add SYMSIZE as a keyword parameter
94/09/14, MWB, added NOCLIP keyword parameter