stvary.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{smcl}
{* 18mar2005}{...}
{bf:help stvary} {right:dialog:  {bf:{dialog stvary}}}
{hline}

{title:Title}

{p2colset 5 20 22 2}{...}
{p2col :{hi:[ST] stvary} {hline 2}}Report variables that vary over time{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 15 2}
{cmd:stvary} [{varlist}] {ifin} [{cmd:,} {opt nosh:ow}]


{pstd}
You must {cmd:stset} your data before using {cmd:stvary}; see {helpb stset}.{p_end}
{pstd}
{cmd:by} may be used with {cmd:stsum}; see {helpb by}.{p_end}
{pstd}
Note that {opt fweight}s, {opt iweight}s, and {opt pweight}s may be specified with {cmd:stset}; see {helpb stset}.{p_end}


{title:Description}

{pstd}
{cmd:stvary} is for use with multiple-record datasets, for which {opt id()}
has been {cmd:stset}.  It reports whether values of variables within subject
vary over time and reports their pattern of missing values.  While
{cmd:stvary} is intended for use with multiple-record st data, ti may be used
with single-record data, as well, but this produces little useful information.

{pstd}
{cmd:stvary} ignores weights, even if you have set them.  {cmd:stvary}
provides a summary of the variables in the computer or data sense of the word.


{title:Option}

{phang}
{opt noshow} prevents {cmd:stvary} from showing the key st variables.  This
option is seldom used since most people type {cmd:stset, show} or 
{cmd:stset, noshow} to set whether they want to see these variables mentioned 
at the top of the output of every st command; see {helpb stset}.


{title:Examples}

    {cmd:. stvary}

{phang}{cmd:. stvary if age>50 & sex==1}


{title:Also see}

{psee}
Manual:  {bf:[ST] stvary}

{psee}
Online:  {help st}, {helpb stdes}, {helpb stfill}, {helpb stset}
{p_end}