Institut für Astronomie und Astrophysik
Abteilung AstronomieSand 1, D-72076 Tübingen, Germany
plot residuum in 1-sigma units
group - (optional) Define the data group to plot. Default is the current group. Must be in range [0..29].
delchi - plots the difference between data y-values and model, in units of 1 sigma. This is: plot (y - model_y)/error X range is kept, Y range is adapted to maximal values.
Apart from IDL oplot keywords following special are defined: noerror - Do not plot error bars. This is useful for tight data sets. selected - Define range from selected datapoints. Usefull when fitting selected datapoints only. distinct - Plot each subgroup with a different color. deltacolor - Color difference for distinct data sets. deltalinestyle - Increase of line styles for distinct data sets. Default: 0 (no change). deltapsym - Increase of point symbols for distinct data sets. May be positive or negative integer number. Default: 0 (no change). If psym exceeds -7..7 it will be set at 0 (no symbol). Therefore it is recomended to plot data sets with lines with a negative deltapsym (to decrease and restart from 0).
> plot, data, delchi -> data + residuum of chi is displayed.
$Id: cafe_plot_delchi.pro,v 1.20 2004/07/30 17:17:26 goehler Exp $
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