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Institut für Astronomie und Astrophysik

Abteilung Astronomie

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ignore Source code in cafe_ignore.pro


           ignore datapoints for fit
           ignore, range [,subgroup][,group]
Input Parameters
           range    - Defines range of data points to ignore. This can
                      be either:
                       - Data point range, denoted by the data
                         point number:
                         <n1>[-], while ,  are positive
                         numbers. Data point numbers start from zero.
                         Open intervals can be represented with a
                         "*" instead of the number.
                         If only one number is given, a single
                         data point will be referenced.
                         If <val2> is less than  all but the
                         interval <val2>.. are referenced.
                       - X value range, denoted by float point numbers:
                         <val1>-, while , 
                         represents X values defining the interval to
                         reference. Open intervals can be represented
                         with a *  instead of the value. If <val2> is
                         less than <val1> all but the interval
                         <val2>.. is referenced.
                       - Vector of data point indices. The vector is
                         denoted with [val,val,...,val] (indgen may
                         be used also).
                       - Boolean expressions with X/Y values. All
                         values for which this expression is true are
                         referenced. The expression may contain
                         algebraic formulas combined with comparison
                         operators "lt", "le", "eq", "gt", "ge" as used in IDL
                         comparisons. For each data point a keyword
                         is defined which has meaning and can be used
                         for the boolean expression:
                                 x - The x-column value.
                                 y - The y-column value.
                             error - The error column value.
                          selected - True when the data point is selected.
                               def - True when the data point is defined.
                               x1  - Multi column first column value.
                               x2  - Multi column second column
                               x3  - Multi column third column value.
                         To avoid interference with functions which
                         also can be used a lower/upper case
                         distinction  is made. IDL funktions should
                         be upper case.
                      Default is the entire data set to ignore.
                               > ignore, 2
                                 -> ignore data point 2 (the 3-rd)
                               > ignore, 5-22
                                 -> ignore data points 5..22 (starting from 0)
                               > ignore 46-*
                                 -> ignore all data points upwards from point 47.
                               > ignore, 2.2-5.7
                                 -> ignore all data points from x=2.2 to 5.7
                               > ignore, *-0.2
                                 -> ignore all data points up to x=0.2
                               > ignore, 0.5-0.2
                                 -> ignore all data points except
                                    those in 0.2..0.5.
                               >ignore, Y LT 0.5
                                   -> ignore all data points with
                                      Y-values less than  0.5.
           subgroup - (optional) The data set (subgroup) which should
                      be ignored. This can be either the
                      subgroup number or the file name representing
                      the data set. It is possible to set more than
                      one subgroup, either with numbers in brackets
                      ([]) or denoting filenames with wildcards
                      Default is the first subgroup in current used
           group    - (optional) The data group for which the model
                      should be applied.
                      Default is the current group which can be
                      changed with "chgrp". Must be in range [0..29].
Side Effects
           Changes information about data points used for
           fitting. Data points are not excluded.
           > ignore, 0.2-7.5, "test.dat", 3
           -> ignore all x values between 0.2 and 7.5 from
              group 3, subgroup represented by file "test.dat"
Revision History
           $Id: cafe_ignore.pro,v 1.13 2004/05/27 09:10:51 goehler Exp $

Last modified by pro2html on 2005 January 04 at 16:05 UTC

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Jörn Wilms (wilms@astro.uni-tuebingen.de)
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