m1_source.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}
{* 13jan2005}{...}
{cmd:help m1 source}
{hline}
{* index viewsource tt}{...}
{* index copysource tt}{...}
{* index source code}{...}
{* index .mata file}{...}

{title:Title}

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{bf:[M-1] source -- Viewing the source code}


{title:Syntax}

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. {cmd:viewsource}
{it:functionname}{cmd:.mata}


{title:Description}

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Many Mata functions are written in Mata.  
{cmd:viewsource} will allow you to examine their source code.


{title:Remarks}

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Some Mata functions are implemented in C (they are part of Mata itself), and
others are written in Mata.

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{cmd:viewsource} allows you to look at the official source code written in
Mata.  Reviewing this code is a great way to learn Mata.

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The official source code is stored in .mata files.  To see the source
code for {bf:{help mf_diag:[M-5] diag()}}, for instance, type

	. {cmd:viewsource diag.mata}

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You type this at Stata's dot prompt, not at Mata's colon prompt.

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If a function is built-in, such as 
{bf:{help mf_abs:[M-5] abs()}}, here is what will happen when you attempt 
to view the source code:

	. {cmd:viewsource abs.mata}
	{err:file "abs.mata" not found}

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You can verify that {cmd:abs()} is built-in using the 
{bf:{help mata_which:[M-3] mata which}}
command:

	. {cmd:mata: mata which abs()}
	  abs():  built-in

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{cmd:viewsource} can be also used to look at source code of user-written
functions if the distribution included the source code (it might not).


{title:Also see}

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Manual:  {hi:[M-1] source}

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Online:  help for 
{bf:{help viewsource:[P] viewsource}};
{bf:{help m1_intro:[M-1] intro}},
{bf:{help mata:[M-0] intro}}
{p_end}