manova.hlp

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{smcl}
{* 15mar2005}{...}
{cmd:help manova} {right:dialog:  {bf:{dialog manova}}{space 15}}
{right:also see:  {help manova postestimation}}
{hline}

{title:Title}

{p 4 21 2}
{hi:[MV] manova} {hline 2} Multivariate analysis of variance and covariance


{title:Syntax}

{p 8 15 2}{cmdab:mano:va} {depvarlist} {cmd:=}
{it:term} [[{cmd:/}] [{it:term} [{cmd:/}] {it:...}]]
{ifin} {weight}
[{cmd:,} {it:options}]

{pstd}
where {it:term} is of the
form {space 2} {it:varname}[{c -(}{cmd:*}|{cmd:|}{c )-}{it:varname}[{it:...}]]


{synoptset 23 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Model}
{synopt:{opth ca:tegory(varlist)}}names of variables in the {it:terms} that
	are categorical or class{p_end}
{synopt:{opth cl:ass(varlist)}}synonym for {opt category(varlist)}{p_end}
{synopt:{opth cont:inuous(varlist)}}names of variables in the {it:terms} that
	are continuous{p_end}
{synopt:{opt nocons:tant}}suppress constant term{p_end}

{syntab:Reporting}
{synopt:{opt d:etail}}report categorical variable value mappings{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
{cmd:bootstrap}, {cmd:by}, {cmd:jackknife}, and {cmd:statsby} may be used with
{cmd:manova}; see {help prefix}.
{p_end}
{p 4 6 2}
{cmd:aweight}s and {cmd:fweight}s are allowed; see {help weight}
{p_end}
{p 4 6 2}
See {help manova postestimation} for features available after estimation.
{p_end}


{title:Description}

{pstd}
The {cmd:manova} command fits multivariate analysis-of-variance (MANOVA) and multivariate
analysis-of-covariance (MANCOVA) models for balanced and unbalanced designs,
including designs with missing cells, and for factorial, nested, or mixed
designs, or designs involving repeated measures.

{pstd}
See {helpb anova} for univariate ANOVA and ANCOVA models.


{title:Options}

{dlgtab:Model}

{phang}
{opt category(varlist)} indicates the names of the variables in the {it:terms}
that are categorical or class variables.  Stata ordinarily assumes that all
variables are categorical variables, so, in most cases, this option need not
be specified.  If you specify this option, however, the variables referenced
in the {it:terms} that are not listed in the {opt category()} option are
assumed to be continuous.  Also see the {opt class()} and {opt continuous()}
options.

{phang}
{opt class(varlist)} is a synonym for {opt category(varlist)}.

{phang}
{opt continuous(varlist)} indicates the names of the variables in the
{it:terms} that are continuous.  Stata ordinarily assumes that all variables
are categorical variables.  Also see the {opt category()} and {opt class()}
options.

{phang}
{opt noconstant} suppresses the constant term (intercept) from the model.

{dlgtab:Reporting}

{phang}
{opt detail} presents a table showing the actual values of the categorical
variables along with their mapping into level numbers.  You may specify this
option at estimation or upon replay, e.g., {cmd:manova, detail}.


{title:Remarks}

{pstd}
The {cmd:*} in the definition of a {it:term} indicates interaction.  The
{cmd:|} indicates nesting ({cmd:a|b} is said: {cmd:a} is nested within {cmd:b}).
A {cmd:/} between {it:terms} indicates that the {it:term} to the right of the
slash is the error {it:term} for the {it:terms} to the left of the slash.


{title:Examples}

    {cmd:. manova y1 y2 = a}
    {cmd:. manova y1 y2 y3 = a b}
    {cmd:. manova y1 y2 = a b a*b}
    {cmd:. manova y1 y2 = a b c}
{phang}{cmd:. manova y1 y2 = a b c a*b a*c b*c}{p_end}
{phang}{cmd:. manova y1 y2 = a b c a*b a*c b*c a*b*c}


{title:MANCOVA examples}

{phang}{cmd:. manova y1 y2 = a b x, continuous(x)}{p_end}
{phang}{cmd:. manova y1 y2 = a b x z, continuous(x z)}{p_end}
{phang}{cmd:. manova y1 y2 = a b x a*x a*x*x, continuous(x)}{p_end}
{phang}{cmd:. manova y1 y2 = a b a*b x a*x z a*z, continuous(x z)}


{title:Nested MANOVA examples}

{phang}{cmd:. manova out1 out2 = machine / operator|machine /}{p_end}
{phang}{cmd:. manova y1 y2 y3 = t / c|t / d|c|t / p|d|c|t /}


{title:Split-plot MANOVA example}

{phang}{cmd:. manova y1 y2 = pr / cl|pr sk pr*sk / cl*sk|pr / gr|cl*sk|pr /}


{title:Also see}

{psee}
Manual:  {bf:[MV] manova}

{psee}
Online:  {help manova postestimation};{break}
{helpb anova},
{helpb hotelling},
{helpb mvreg};{break}
{helpb anovadef},
{helpb encode}
{p_end}