cluster_centroidlinkage.hlp

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{smcl}
{* 04apr2005}{...}
{cmd:help cluster centroidlinkage} {...}
{right:dialogs:  {bf:{dialog cluster_centroidlinkage:cluster centroidlinkage}}   }
{right:{bf:{dialog clustermat_centroidlinkage:clustermat centroidlinkage}}}
{hline}

{title:Title}

{p2colset 5 37 39 2}{...}
{p2col :{hi:[MV] cluster centroidlinkage} {hline 2}}Centroid linkage cluster
analysis{p_end}
{p2colreset}{...}


{title:Syntax}

{pstd}
Cluster analysis of data

{p 8 35 2}
{cmd:cluster} {space 2} {cmdab:cent:roidlinkage} [{varlist}] {ifin}
[{cmd:,} {it:options} ]

{pstd}
Cluster analysis of a dissimilarity matrix

{p 8 35 2}
{cmd:clustermat} {cmdab:cent:roidlinkage}{space 2}{it:matname}{space 2}{ifin}
[{cmd:,} {it:clustermat_opts} ]

INCLUDE help cluster_hier_optstab

INCLUDE help clustermat_hier_optstab


{title:Description}

{pstd}
The {cmd:cluster centroidlinkage} command performs hierarchical agglomerative
centroid linkage cluster analysis.  See {bf:{help cluster}} for a listing of
the {cmd:cluster} commands.

{pstd}
{cmd:clustermat centroidlinkage} performs hierarchical agglomerative centroid
linkage cluster analysis on the dissimilarity matrix {it:matname}; see
{bf:{help clustermat}} for a description of the other {cmd:clustermat}
commands.

{pstd}
After {cmd:cluster centroidlinkage} or {cmd:clustermat centroidlinkage}
INCLUDE help cluster_post


{title:Options for cluster centroidlinkage}

{* default measure is L2squared -- use cluster_hier_opts2.ihlp}{...}
INCLUDE help cluster_hier_opts2

{* assumes -generate()- option is last one in cluster_hier_opts2.ihlp}{...}
{pmore}
Centroid linkage can produce reversals or crossovers.  When reversals happen,
{cmd:cluster centroidlinkage} also creates a fourth variable with the suffix
{hi:_pht}.  This is a pseudoheight variable that is used by some of the
postclustering commands to properly interpret the {hi:_hgt} variable.


{title:Options for clustermat centroidlinkage}

INCLUDE help clustermat_hier_opts

{* assumes -generate()- option is last one in clustermat_hier_opts.ihlp}{...}
{pmore}
Centroid linkage can produce reversals or crossovers.  When reversals happen,
{cmd:cluster centroidlinkage} also creates a fourth variable with the suffix
{hi:_pht}.  This is a pseudoheight variable that is used by some of the
postclustering commands to properly interpret the {hi:_hgt} variable.


{title:Examples}

{phang}{cmd:. cluster centroidlinkage x1 x2 x3 x4, name(L2centlnk)}

{phang}{cmd:. cluster centroid a1-a60, measure(matching) name(centlink)}

{phang}{cmd:. cluster cent x*, measure(L(1.5))}

{phang}{cmd:. matrix D =} ...{p_end}
{phang}{cmd:. clustermat centroid D, clear name(centroid_on_D)}


{title:Also see}

{psee}
Manual:  {bf:[MV] cluster},{break}
{bf:[MV] cluster centroidlinkage}

{psee}
Online:  {bf:{help cluster}}, {bf:{help clustermat}};{break}
{bf:{help cluster averagelinkage}},
{bf:{help cluster completelinkage}},
{bf:{help cluster dendrogram}},
{bf:{help cluster generate}},
{bf:{help cluster kmeans}},
{bf:{help cluster kmedians}},
{bf:{help cluster medianlinkage}},
{bf:{help cluster notes}},
{help cluster programming},
{bf:{help cluster singlelinkage}},
{bf:{help cluster stop}},
{help cluster utility},
{bf:{help cluster wardslinkage}},
{bf:{help cluster waveragelinkage}},
{help measure option}
{p_end}