mf_logit.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}
{* 29mar2005}{...}
{cmd:help mata logit()}
{hline}
{* index logit()}{...}
{* index invlogit()}{...}
{* index cloglog()}{...}
{* index invcloglog()}{...}

{title:Title}

{p 4 8 2}
{bf:[M-5] logit() -- Log odds and complementary log-log}


{title:Syntax}

{p 8 12 2}
{it:real matrix}{bind:     }
{cmd:logit(}{it:real matrix X}{cmd:)}

{p 8 12 2}
{it:real matrix}{bind:  }
{cmd:invlogit(}{it:real matrix X}{cmd:)}

{p 8 12 2}
{it:real matrix}{bind:   }
{cmd:cloglog(}{it:real matrix X}{cmd:)}

{p 8 12 2}
{it:real matrix} 
{cmd:invcloglog(}{it:real matrix X}{cmd:)}


{title:Description}

{p 4 4 2}
    {cmd:logit(}{it:X}{cmd:)} 
    returns the log of the odds ratio of the elements of {it:X}, 
    ln{c -(}{it:x}/(1-{it:x}){c )-}.

{p 4 4 2}
    {cmd:invlogit(}{it:X}{cmd:)} 
    returns the inverse of the {cmd:logit()} of the elements of {it:X}, 
    exp({it:x})/{c -(}1+exp({it:x}){c )-}.

{p 4 4 2}
    {cmd:cloglog(}{it:X}{cmd:)} 
    returns the complementary log-log of the elements of {it:X}, 
    ln{c -(}-ln(1-{it:x}){c )-}.

{p 4 4 2}
    {cmd:invcloglog(}{it:X}{cmd:)} 
    returns the elementwise inverse of {cmd:cloglog()} of the elements of
    {it:X},
    1-exp{c -(}-exp({it:x}){c )-}.


{title:Conformability}

{p 4 4 2}
All functions return a matrix of the same dimension as input
containing element-by-element calculated results.

    
{title:Diagnostics}

{p 4 4 2}
    {cmd:logit(}{it:X}{cmd:)} and 
    {cmd:cloglog(}{it:X}{cmd:)}
    return missing when {it:x} <= 0 or {it:x} >= 1.


{title:Source code}

{p 4 4 2}
{view logit.mata, adopath asis:logit.mata},
{view invlogit.mata, adopath asis:invlogit.mata},
{view cloglog.mata, adopath asis:cloglog.mata},
{view invcloglog.mata, adopath asis:invcloglog.mata}


{title:Also see}

{p 4 13 2}
Manual:  {hi:[M-5] logit()}

{p 4 13 2}
Online:  help for 
{bf:{help m4_statistical:[M-4] statistical}}
{p_end}