Aggregation Feature Comparison.

Three programs are available for aggregating HAR files:

ViewHAR is a general purpose Windows program for viewing/editing a HAR file. It is able to perform simple (but not weighted) aggregation on all headers that match supplied mappings. Information about new sets and mappings must be present on the main input file.

AggHAR is a command-line Win32 program which performs simple or weighted aggregation on all headers that match supplied mappings. In addition, it will infer implied subset mappings. It has a special memory-conserving mode that allows you to aggregate huge input files on PCs with limited memory. Information about new sets and mappings must be stored on a second, supplementary, input file. AggHAR uses double-precision arithmetic for greater accuracy.

DAGG is an old-fashioned command-line program which performs many operations, including simple or weighted aggregation, disaggregation and RASsing. You have to specify the operations individually for each header, and many operations have to be broken into several stages. Information about new sets and mappings must be stored on a second, supplementary, input file. Unfortunately, DAGG strips off set labelling information from real matrices. Fortran source code is available, so you can run DAGG on non-MS operating systems. Download DAGG from:

http://www.copsmodels.com/gpmark.htm

You can also write your own, model-specific, TABLO programs to aggregate, disaggregate, or otherwise manipulate data. This is the most flexible (but time-consuming) approach.

URL of this topic: www.copsmodels.com/webhelp/viewhar/hc_aggfeature.htm

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