wntestb.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}
{* 14mar2005}{...}
{cmd:help wntestb}{right:dialog:  {bf:{dialog wntestb}}}
{hline}

{title:Title}

{p2colset 5 21 23 2}{...}
{p2col :{hi:[TS] wntestb} {hline 2}}Bartlett's periodogram-based test for white
noise{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 17 2}{cmd:wntestb} {varname} {ifin} 
[{cmd:,} {it:options}]

{synoptset 25 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Main}
{synopt :{opt ta:ble}}display a table instead of graphical output{p_end}
{synopt :{opt l:evel(#)}}set confidence level; default is
  {cmd:level(95)}{p_end}

{syntab:Plot}
{synopt :{it:{help marker_options}}}change look of markers (color, 
	size, etc.){p_end}
{synopt :{it:{help marker_label_options}}}add marker labels; 
	change look or position{p_end}
{synopt :{it:{help cline_options}}}add connecting lines; change look{p_end}

{syntab:Add plot}
{synopt :{opth "addplot(addplot_option:plot)"}}add other plots to the generated graph{p_end}

{syntab:Y-Axis, X-Axis, Title, Caption, Legend, Overall}
{synopt :{it:{help twoway_options}}}any options other than {cmd:by()} documented in {bind:{bf:[G]} {it:twoway_options}}{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2} You must {helpb tsset} your data before using {cmd:wntestb}.  In
addition, the time series must be dense (nonmissing and no gaps in the time
variable) in the specified sample.{p_end}
{p 4 6 2}{it:varname} may contain time-series operators; see {help tsvarlist}.
{p_end}


{title:Description}

{pstd}
{cmd:wntestb} performs Bartlett's periodogram-based test for white noise.
The result is presented graphically by default but, optionally, may be 
presented as text in a table.


{title:Options}

{dlgtab:Main}

{phang}
{opt table} displays the test results as a table instead of as the
default graph.

{phang}
{opt level(#)} specifies the confidence level, as a percentage, for the
confidence bands included on the graph.  The default is {cmd:level(95)} or as
set by {helpb set level}.

{dlgtab:Plot}

{phang}
{it:marker_options}
    specify the look of markers plotted at the correlation points.  This
    look includes the marker symbol, the marker size, its color and outline;
    see {it:{help marker_options}}.

{phang}
{it:marker_label_options}
    specify if and how the markers are to be labeled; 
    see {it:{help marker_label_options}}.

{phang}
{it:cline_options} 
    specify if the points are to be connected with lines and the rendition of
    those lines; see {it:{help line_options}}.

{dlgtab:Add plot}

{phang}
{opt addplot(plot)} adds specified plots to the generated graph; see 
{it:{help addplot_option}}.

{dlgtab:Y-Axis, X-Axis, Title, Caption, Legend, Overall}

{phang}
{it:twoway_options} are any of the options documented in 
{it:{help twoway_options}}, excluding {opt by()}.  These include options for
titling the graph (see {it:{help title_options}}) and saving the graph to disk
(see {it:{help saving_option}}).


{title:Examples}
 
{phang}{cmd:. gen x = invnorm(uniform())}{p_end}
{phang}{cmd:. gen t = _n}{p_end}
{phang}{cmd:. tsset t}{p_end}
{phang}{cmd:. wntestb x}{p_end}


{title:Also see}

{psee}
Manual:  {bf:[TS] wntestb}{p_end}

{psee}
Online:  {helpb corrgram}, {helpb cumsp}, {helpb pergram}, {helpb tsset}, 
{helpb wntestq}{p_end}