help sqclusterdat                                               (SJ6-4: st0111)
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Title

    sqclusterdat -- Add solution of MDS on dissimilarity matrix to sequence
                      data


Syntax

        sqclusterdat [, return keep]


Description

    If the command sqom was performed with option full, further analysis of
    the resulting dissimilarity matrix becomes indispensable. Cluster
    analysis is the most common technique for this step. Unfortunately,
    sequence data and the resulting dissimilarity matrices have different
    dimensions, so that the cluster variables cannot easily be attached to
    the sequence data on a row-by-row basis. sqclusterdat allows linking the
    results of user-specified cluster commands to the original sequence data.

    Without return, the command constructs a dataset that is built from
    instructions left over from the last sqom command.  The user may then
    specify arbitrary clustermat commands, as well as applicable
    postclustering commands in this dataset.  After performing the cluster
    analysis, sqclusterdat, return brings the cluster results back into the
    original sequence data.

    Note that sqclusterdat, return only works if you have specified the
    option add in for any cluster analyisis performed with clustermat.

    The option keep(varlist) is usable for clusterdat, return only. It is
    used to specify a list of hand-made variables that should be merged to
    the original dataset as well. This is especially useful for variables
    created with cluster generate.

    The convenience command sqclustermat allows performing the three steps
    with one single command. Cluster postestimation commands do not work in
    this case, however.


Author

    Ulrich Kohler, WZB, kohler@wzb.eu


Examples

    . sqom, full k(2)
    . sqclusterdat
    . clustermat singlelinkage SQdist, add name(mydist1)
    . clustermat singlelinkage SQdist, add name(mydist2)
    . cluster tree mydist1
    . cluster generate gr = groups(2)
    . sqclusterdat, return keep(gr)


Also see

    Manual:  [MV] clustermat

    Online: sq, sqdemo, sqset, sqdes, sqegen, sqstat, sqindexplot, 
             sqparcoord, sqom, sqclusterdat, sqclustermat