OPLOTERR
The
OPLOTERR procedure plots
error bars over a previously drawn
plot. A plot of
X
versus
Y
with error bars drawn from
Y
-
Err
to
Y
+
Err
is written to the output device over any plot already there.
This routine is written in the IDL language. Its source code can be found in the file
oploterr.pro
in the
lib
subdirectory of the IDL distribution.
Calling Sequence
OPLOTERR,
[ X ,] Y , Err [, Psym ]
Arguments
X
An 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
X
is not passed, then INDGEN(
Y
) is assumed for the X values.
Y
The array of Y values.
Y
cannot be of type string.
Err
The array of error bar values.
PSYM
The plotting symbol to use (default = +7).
