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Picking data records based on a classified data

 

pickrec Pick data records referenced by a classified data
-c <cldata> classified data for pointing records
-d <data> source data
-dout <trgdata> result data

This operation picks a subset of data records from <data>. The records to be picked are pointed to by the indexes in <cldata>. Typically this command is used to restrict the analysis scope to certain data records, which have been chosen to some neuron(s). With mergecld (see 3.7) such a classified data can be formed, which contains the indexes of data records chosen to several neurons.

Example (ex3.2): This example shows the necessary commands and phases needed to restrict scope to some part of the original data using a TS-SOM. select is used to select two groups g1 and g3, which could be analyzed in more detail in the second phase.

...
NDA> somtr -d boston -sout som1 -l 4
...
NDA> somcl -d boston -s som1 -cout cld1
NDA> mkgrp grp1 -s som1
...
# Interactive selection of groups
NDA> mergecld -c1 som1Grp -c2 cld1 -cout classif
# Select a subset of groups
NDA> select partCls -cl classif.g1 classif.g3
NDA> pickrec -d boston -c partCls -dout data3

figure1276


next up previous contents
Next: Sorting a data frame Up: Data reorganization Previous: Binarizing a classification to

Anssi Lensu
Tue Jul 23 11:58:18 EET DST 2002