The operation creates a new data frame to which it concates data records from the given data. The operation slides a window over the source data, and it concates data record inside the window.
For instance, the source data includes records 
, 
, 
, 
, and so on. If the parameter <length> is 2 and <step> is 1 (default), then the target data will include the data records 
, 
, and so on. Here the indexes refers to the data records of the source data. If the parameter <step1> is given, then the procedure skips over as many data records as defined, when it moves the window. The parameter <step2> is a step between data records within time windows. See also the figure below and the command from Sect. 3.12.
The result data fields are named according to the names in the source data with indexed extensions. The indexes are created to indicate the position inside the window. For instance, the field "x" would lead to new fields called "x_0", "x_1", "x_2" and so on.
Example (ex3.7): The following example demonstrates the use of the command. The length of the window is now four.
NDA> load gauss3.dat # # collecting records # NDA> concseq -d gauss -dout gauss2 -len 4 # # the normal SOM processing # NDA> prepro -d gauss2 -dout pre -edev -n NDA> somtr -d pre -sout som1 -l 5 NDA> somcl -d pre -s som1 -cout cld NDA> clstat -d gauss2 -c cld -dout sta -all NDA> mkgrp win1 -s som1 NDA> setgdat win1 -d sta NDA> setgcld win1 -c cld NDA> show win1 # # visualization through line diagrams # NDA> ldgr win1 -n x -co red NDA> ldgrc win1 -n x -inx 0 -f sta.x_0_avg -sca som2 NDA> ldgrc win1 -n x -inx 1 -f sta.x_1_avg -sca som2 NDA> ldgrc win1 -n x -inx 2 -f sta.x_2_avg -sca som2 NDA> ldgrc win1 -n x -inx 3 -f sta.x_3_avg -sca som2 NDA> ldgr win1 -n y -co blue NDA> ldgrc win1 -n y -inx 0 -f sta.y_0_avg -sca som2 NDA> ldgrc win1 -n y -inx 1 -f sta.y_1_avg -sca som2 NDA> ldgrc win1 -n y -inx 2 -f sta.y_2_avg -sca som2 NDA> ldgrc win1 -n y -inx 3 -f sta.y_3_avg -sca som2 NDA> dis win1 ldgrlab NDA> layer win1 -l 3 NDA> draw /win1
