ipolate.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}
{* 28nov2004}{...}
{cmd:help ipolate}{right:dialog:  {bf:{dialog ipolate}}}
{hline}

{title:Title}

{p2colset 5 20 22 2}{...}
{p2col :{hi:[D] ipolate} {hline 2}}Linearly interpolate (extrapolate)
values{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 16 2}
{cmd:ipolate}
{it:yvar}
{it:xvar}
{ifin}
{cmd:,}
{opth g:enerate(newvar)} [{opt e:polate}]

{phang}
{opt by} may be used with {opt ipolate}; see {helpb by}.


{title:Description}

{pstd}
{opt ipolate} creates {newvar} = {it:yvar}, where {it:yvar} is not
missing.  Where {it:yvar} is missing, {opt ipolate}
fills in {it:newvar} with linearly interpolated (and optionally
extrapolated) values of {it:yvar}.


{title:Options}

{phang}{opth generate(newvar)} is required and specifies the
name of the new variable to be created.

{phang}{opt epolate} specifies that values be both interpolated and
extrapolated.  Interpolation only is the default.


{title:Examples}

{phang}{cmd:. ipolate y x, gen(yprime)}{p_end}

{phang}{cmd:. ipolate y x, gen(yprime) epolate}{p_end}

{phang}{cmd:. by magazine:  ipolate circ year, gen(icrc)}{p_end}


{title:Also see}

{psee}
Manual:  {bf:[D] ipolate}

{psee}
Online:  {helpb impute}, {helpb lowess}{p_end}