stsum.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}
{* 16mar2005}{...}
{cmd:help stsum} {right:dialog:  {bf:{dialog stsum}}}
{hline}

{title:Title}

{p2colset 5 19 21 2}{...}
{p2col :{hi:[ST] stsum} {hline 2}}Summarize survival-time data{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 14 2}
{cmd:stsum} {ifin} [{cmd:,} {opth by(varlist)} {opt nosh:ow}]

{pstd}
You must {cmd:stset} your data before using {cmd:stsum}; 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:stsum} presents summary statistics: time at risk, incidence rate,
number of subjects, and the 25th, 50th, and 75th percentiles of survival time.

{pstd}
{cmd:stsum} can be used with single- or multiple-record or single- or
multiple-failure st date.


{title:Options}

{phang}
{opth by(varlist)} requests separate summaries for each group along with an
overall total.  Observations are in the same group if they have equal values
of the variables in {it:varlist}.  {it:varlist} may contain any number of
string or numeric variables.

{phang}
{opt noshow} prevents {cmd:stsum} 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:. stsum}

    {cmd:. stsum if age>50}

    {cmd:. stsum, by(agecat)}


{title:Also see}

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

{psee}
Online:  {help st}, {helpb stdes}, {helpb stgen},
{helpb stir}, {help sts}, {helpb stset}, {helpb stvary}
{p_end}