ameans.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}
{* 22feb2005}{...}
{cmd:help ameans}{right:dialog:  {bf:{dialog ameans}}}
{hline}

{title:Title}

{p2colset 5 19 21 2}{...}
{p2col :{hi:[R] ameans} {hline 2}}Arithmetic, geometric, and harmonic means{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 14 2}
{cmd:ameans} [{varlist}]
{ifin} {weight}
[{cmd:,} {it:options}]

{synoptset 16 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Main}
{synopt:{opt a:dd(#)}}add {it:#} to each variable in {it:varlist}{p_end}
{synopt:{opt o:nly}}add {it:#} only to variables with nonpositive values{p_end}
{synopt:{opt l:evel(#)}}set confidence level; default is {cmd:level(95)}{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
{cmd:by} may be used with {cmd:ameans}; see {helpb by}.{p_end}
{p 4 6 2}
{cmd:aweight}s and {cmd:fweight}s are allowed; see {help weight}.


{title:Description}

{pstd}
{cmd:ameans} computes the arithmetic, geometric, and harmonic means, 
with their corresponding confidence intervals, for each variable in {varlist}
or for all the variables in the data if {it:varlist} is not specified.
{cmd:gmeans} and {cmd:hmeans} are synonyms for {cmd:ameans}.

{pstd}
If you simply want arithmetic means and corresponding confidence intervals,
see {helpb ci}.


{title:Options}

{dlgtab:Main}

{phang}
{opt add(#)} adds the value {it:#} to each variable in
{varlist} before computing the means and confidence intervals.  This is
useful when analyzing variables with nonpositive values.

{phang}
{opt only} modifies the action of the {opt add()} option so that it 
only adds {it:#} to variables with at least one nonpositive value.

{phang}
{opt level(#)} specifies the confidence level, as a percentage,
for confidence intervals. The default is {cmd:level(95)} or as set by 
{helpb set level}.


{title:Examples}

    {cmd:. ameans}

    {cmd:. ameans age income}


{title:Also see}
 
{psee}
Manual:  {bf:[R] ameans}

{psee}
Online:  {helpb ci}, {helpb summarize}
{p_end}