mf_sqrt.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 sqrt()}
{hline}
{* index sqrt()}{...}
{* index square root}{...}

{title:Title}

{p 4 4 2}
{bf:[M-5] sqrt() -- Square root}


{title:Syntax}

{p 8 12 2}
{it:numeric matrix} 
{cmd:sqrt(}{it:numeric matrix Z}{cmd:)}


{title:Description}

{p 4 4 2}
{cmd:sqrt(}{it:Z}{cmd:)} returns the elementwise square root of {it:Z}.


{title:Conformability}

    {cmd:sqrt(}{it:Z}{cmd:)}
	     {it:Z}:  {it:r x c}
	{it:result}:  {it:r x c}


{title:Diagnostics}

{p 4 4 2}
{cmd:sqrt(}{it:Z}{cmd:)}
returns missing when {it:Z} is real and {it:Z}<0; i.e.,
{cmd:sqrt(}-4{cmd:)}==. but {cmd:sqrt(}-4+0i{cmd:)} = 2i.


{title:Source code}

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


{title:Also see}

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

{p 4 13 2}
Online:  help for 
{bf:{help mf_cholesky:[M-5] cholesky()}};
{bf:{help m4_scalar:[M-4] scalar}}
{p_end}