mf_direxternal.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}
{* 21mar2005}{...}
{cmd:help mata direxternal()}
{hline}
{* index externals}{...}
{* index global variable}{...}
{* index direxternal}{...}

{title:Title}

{p 4 4 2}
{bf:[M-5] direxternal() -- Obtain list of existing external globals}


{title:Syntax}

{p 8 12 2}
{it:string}
{it:colvector}
{cmd:direxternal(}{it:string scalar pattern}{cmd:)}


{title:Description}

{p 4 4 2}
{cmd:direxternal(}{it:pattern}{cmd:)}
returns a column vector containing the names matching {it:pattern} 
of the existing external globals.  
{cmd:direxternal()} returns J(0,1,"") if there are no such globals.

{p 4 4 2}
{it:pattern} is interpreted by {bf:{help mf_strmatch:[M-5] strmatch()}}.


{title:Remarks}

{p 4 4 2}
See {bf:{help mf_findexternal:[M-5] findexternal()}} for the definition of a
global.  

{p 4 4 2}
A list of all globals can be obtained 
by {cmd:direxternal("*")}.


{title:Conformability}

    {cmd:direxternal(}{it:pattern}{cmd:)}:
	  {it:pattern}:  1 {it:x} 1
	   {it:result}:  {it:n} {it:x} 1


{title:Diagnostics}

{p 4 4 2}
{cmd:direxternal(}{it:pattern}{cmd:)}
returns J(0,1,"") when there are no globals matching {it:pattern}.


{title:Source code}

{p 4 4 2}
Function is built-in.


{title:Also see}

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

{p 4 13 2}
Online:  help for 
{bf:{help mf_findexternal:[M-5] findexternal()}};
{bf:{help m4_programming:[M-4] programming}}
{p_end}