[AIT logo]

Institut für Astronomie und Astrophysik

Abteilung Astronomie

Sand 1, D-72076 Tübingen, Germany
[Uni logo]

integrate Source code in cafe_integrate.pro


           integrates data set(s) in given range and prints result.
         integrate[,range] [,subgroup][,group]
Input Parameters
           range    - (optional) Defines data points to sum up. 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 to fold the entire data set.
           subgroup - (optional) The data set (subgroup) for which the model
                      should be applied. 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
                      ([]) separated with ","; or denoting filenames
                      with wildcards ("*").
                      Default are all subgroups in currently used
           group    - (optional) The data group for which folding
                      should applied.
                      Default is the current group. Must be in
                      range [0..29].
Output Parameters
          The y value of all data points given is summed and printed
Side Effects
           > data,test.dat
           > integrate,50.-100.
           -> print sum of all data points in the x-range 50-100 (not
              the data point number!)
Revision History
           $Id: cafe_integrate.pro,v 1.4 2004/06/17 16:36:59 goehler Exp $

Last modified by pro2html on 2005 January 04 at 16:06 UTC

[Home Page] [Software, Documentation] [IDL Documentation] [Quick Reference] [Feedback]

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