mf_missing.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}
{* 16sep2004}{...}
{cmd:help mata missing()}
{hline}
{* index colmissing()}{...}
{* index rowmissing()}{...}
{* index missing()}{...}
{* index colnonmissing()}{...}
{* index rownonmissing()}{...}
{* index nonmissing()}{...}
{* index missing values}{...}

{title:Title}

{p 4 8 2}
{bf:[M-5] missing() -- Count missing and nonmissing values}


{title:Syntax}

{p 8 8 2}
{it:real rowvector} {cmd:colmissing(}{it:numeric matrix X}{cmd:)}

{p 8 8 2}
{it:real colvector} {cmd:rowmissing(}{it:numeric matrix X}{cmd:)}

{p 8 8 2}
{it:real scalar}{bind:       }{cmd:missing(}{it:numeric matrix X}{cmd:)}


{p 8 8 2}
{it:real rowvector} {cmd:colnonmissing(}{it:numeric matrix X}{cmd:)}

{p 8 8 2}
{it:real colvector} {cmd:rownonmissing(}{it:numeric matrix X}{cmd:)}

{p 8 8 2}
{it:real scalar}{bind:       }{cmd:nonmissing(}{it:numeric matrix X}{cmd:)}


{title:Description}

{p 4 4 2}
These functions return the indicated count of missing or nonmissing values.

{p 4 4 2}
{cmd:colmissing(}{it:X}{cmd:)}
returns the count of missing values of each column of {it:X},
{cmd:rowmissing(}{it:X}{cmd:)}
returns the count of missing values of each row, 
and {cmd:missing(}{it:X}{cmd:)}
returns the overall count.

{p 4 4 2}
{cmd:colnonmissing(}{it:X}{cmd:)}
returns the count of nonmissing values of each column of {it:X},
{cmd:rownonmissing(}{it:X}{cmd:)}
returns the count of nonmissing values of each row, 
and {cmd:nonmissing(}{it:X}{cmd:)}
returns the overall count.


{title:Remarks}

	    {cmd:colnonmissing(}{it:X}{cmd:)}  =  {cmd:rows(}{it:X}{cmd:) :- colmissing(}{it:X}{cmd:)}

	    {cmd:rownonmissing(}{it:X}{cmd:)}  =  {cmd:cols(}{it:X}{cmd:) :- rowmissing(}{it:X}{cmd:)}

	       {cmd:nonmissing(}{it:X}{cmd:)}  =  {cmd:rows(}{it:X}{cmd:)*cols(}{it:X}{cmd:) - missing(}{it:X}{cmd:)}



{title:Conformability}

{p 4 4 2}
    {cmd:colmissing(}{it:X}{cmd:)},
    {cmd:colnonmissing(}{it:X}{cmd:)}:
{p_end}
		{it:X}:  {it:r x c}
	   {it:result}:  1 {it:x c}

{p 4 4 2}
    {cmd:rowmissing(}{it:X}{cmd:)},
    {cmd:rownonmissing(}{it:X}{cmd:)}:
{p_end}
		{it:X}:  {it:r x c}
	   {it:result}:  {it:r x} 1

{p 4 4 2}
    {cmd:missing(}{it:X}{cmd:)},
    {cmd:nonmissing(}{it:X}{cmd:)}:
{p_end}
		{it:X}:  {it:r x c}
	   {it:result}:  1 {it:x} 1


{title:Diagnostics}

{p 4 4 2}
    None.


{title:Source code}

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


{title:Also see}

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

{p 4 13 2}
Online:  help for 
{bf:{help mf_editmissing:[M-5] editmissing()}};
{bf:{help m4_utility:[M-4] utility}}
{p_end}