mf_st_viewvars.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}
{* 28mar2005}{...}
{cmd:help mata st_viewvars()}
{hline}
{* index view matrix}{...}
{* index st_viewvars()}{...}
{* index st_viewobs()}{...}

{title:Title}

{p 4 4 2}
{bf:[M-5] st_viewvars() -- Variables and observations of view}


{title:Syntax}

{p 8 12 2}
{it:real rowvector} 
{cmd:st_viewvars(}{it:matrix V}{cmd:)}

{p 8 12 2}
{it:real matrix}{bind:    }
{cmd:st_viewobs(}{it:matrix V}{cmd:)}


{p 4 8 2}
where {it:V} is required to be a view.


{title:Description}

{p 4 4 2}
{cmd:st_viewvars(}{it:V}{cmd:)}
returns the indices of the Stata variables corresponding to the 
columns of {it:V}.

{p 4 4 2}
{cmd:st_viewobs(}{it:V}{cmd:)} 
returns the Stata observation numbers corresponding to the rows of 
{it:V}.  Returned is either a 1 {it:x} 2 rowvector recording the observation
range, or an {it:N x} 1 colvector recording the individual observation numbers.

{title:Remarks}

{p 4 4 2}
The results returned by these two functions are suitable for 
inclusion as arguments in subsequent calls to 
{bf:{help mf_st_view:[M-5] st_view()}}
and 
{bf:{help mf_st_view:st_sview()}}.


{title:Conformability}

    {cmd:st_viewvars(}{it:V}{cmd:)}
		{it:V}:  {it:N x k}
	   {it:result}:  1 {it:x k}

    {cmd:st_viewobs(}{it:V}{cmd:)}
		{it:V}:  {it:N x k}
	   {it:result}:  1 {it:x} 2  or  {it:N x} 1


{title:Diagnostics}

{p 4 4 2}
{cmd:st_viewvars(}{it:V}{cmd:)}
and
{cmd:st_viewobs(}{it:V}{cmd:)}
abort with error if {cmd:V} is not a view.


{title:Source code}

{p 4 4 2}
Functions are built-in.


{title:Also see}

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

{p 4 13 2}
Online:  help for 
{bf:{help mf_st_view:[M-5] st_view()}};
{bf:{help m4_stata:[M-4] stata}}
{p_end}