This command generates a new document showing mean (average) values of Y for all points within a user-specified interval in X. The command also creates error bars with a choice for the error bar amplitudes of:
|1.||Mean minus the extreme high and low amplitudes.|
|2.||Standard error from the mean. For purposes of this command, standard error is the standard deviation divided by the square root of the number of points within any interval.|
|3.||Standard deviation. Standard deviation is defined by|
If the "Group X values within interval" value is set to 0, points are grouped only if the X coordinate is exactly the same. Otherwise input X values are rounded to the nearest interval.
The "Start at X=" entry determines the starting value of X in the output, with all subsequent X values being equal to that start value + some whole number times the interval. "Start at X=" is not used if the interval is set to 0 (no grouping).
With "High and Low extremes" selected and an interval of 2.0, "Start at X" = 0, this graph:
produces this result: