{smcl}
{* 25march2006}{...}
{cmd:help sqparcoord}{right:(SJ6-4: st0111)}
{hline}

{title:Title}

{p2colset 5 11 13 2}{...}
{p2col :{hi:sqparcoord} {hline 2} Parallel-coordinates plot for sequence data}{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 17 2}
{cmdab:sqparcoord}
{ifin}
[{cmd:,} {it:options}]

{synoptset 20}{...}
{synopthdr}
{synoptline}
{synopt:{opt ranks(numlist)}}restrict tabulation on most frequent
{it:numlist}{p_end}
{synopt:{opt so}}apply same order similarity{p_end}
{synopt:{opt offset(#)}}add random noise to vertical position of sequence lines{p_end}
{synopt:{opt wlines(#)}}highlight sequence lines according to frequency{p_end}
{synopt:{opt gapinclude}}include sequences with gaps in the tabulation{p_end}
{synopt:{opt subseq:uence(a,b)}}use only subsequence between positions a and b{p_end}
{synopt:{it:twoway_options}}options allowed for {helpb graph twoway}{p_end}
{synoptline}
{p2colreset}{...}


{title:Description}

{pstd} {cmd:sqparcoord} draws sequences as a parallel-coordinates plot,
with some trickery added.


{title:Options}

{phang}{opt ranks(numlist)} is used to restrict the output to the
most frequent sequences. {it:{help numlist}} refers to the position of the
sequences in the sorted frequency table. Hence, {cmd:ranks(1)} refers to the
most frequent sequence, whereas {cmd:ranks(1/10)} refers to the 10 most
frequent sequences. You can also specify {cmd:ranks(2(2)20)}.

{phang}{cmd:so} is used to request a plot where only the order of
elements is shown (same-order similarity). With this option the
sequences A-B-B-A and A-B-A-A would both be drawn as if they were
A-B-A. Option {cmd:se}, which is available for many other
SQ-Ados, is not applicable here.

{phang}{opt offset(#)} adds random noise to the vertical position of
sequence lines.

{phang}{cmd:wlines(#)} is used draw more frequent sequences thicker
than le,ss frequent ones. Within the parentheses a number is used to
specify the factor by which the thickness is increased. The number
given is multiplied with the relative frequency of the sequences and
passed as {it:{help relativesize}} to the option {cmd:lwidth()} of
{helpb graph twoway line} (also see {it:{help linewidthstyle}}).

{phang}{cmd:gapinclude} is used to include sequences with gaps. The
default behavior is to drop sequences with gaps from the graph. The
gaps will be not visible in the parallel-coordinates plot. 
The term gap refers only to missing values on the element variable
within a sequence. Sequences with missing values at the beginning and
at the end of a sequence are included in any case. You might consider
using {cmd:sqset} with option {cmd:trim} to get rid of superfluous
missings (see {help sq##3:sq} for details.){p_end}


{phang}{cmd:subsequence(a,b)} is used to include only the part of
the sequence that is between position a and b, whereby a and b refer
to the position defined in the order variable. {p_end}

{phang}
{it:twoway_options} are a set of common options supported by all
{cmd:twoway} commands; see {it:{help twoway_options}}.


{title:Author}

{pstd}Ulrich Kohler, WZB, kohler@wz-berlin.de{p_end}


{title:Examples}

{phang}{cmd:. sqparcoord, wline(3)}

{phang}{cmd:. sqparcoord, ranks(1/10) offset(.2)}


{title:Also see}

{psee}
Manual:  {bf:[G] graph}, {bf:[G] graph twoway rbar}, {bf:[G] barlook options} 

{psee} Online: {helpb parcoord} (if installed), {helpb sq},
{helpb sqdemo}, {helpb sqset}, {helpb sqdes}, {helpb sqegen}, {helpb sqstat},
{helpb sqindexplot}, {helpb sqparcoord}, {helpb sqom},
{helpb sqclusterdat}, {helpb sqclustermat} {p_end}