xttab.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}
{* 22mar2005}{...}
{cmd:help xttab}, {cmd:help xttrans}{right:dialogs:  {bf:{dialog xttab}}  {bf:{dialog xttrans}}}
{hline}

{title:Title}

{p2colset 5 19 21 2}{...}
{p2col :{hi:[XT] xttab} {hline 2}}Tabulate xt data{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 16 2}
{cmd:xttab} {varname} [{it:{help if}}]  [{cmd:,} {opth "i(varname:varname_i)"}]

{p 8 16 2}
{cmd:xttrans} {varname} [{it:{help if}}]  [{cmd:,} {opth "i(varname:varname_i)"}
{opth "t(varname:varname_t)"} {opt f:req}

{pstd}
{cmd:by} may be used with {cmd:xttab} and {cmd:xttrans}; see {helpb by}.


{title:Description}

{pstd}
{cmd:xttab}, a generalization of {helpb tabulate}, performs one-way
tabulations and decomposes counts into between and within components in
cross-sectional time-series (xt) data.

{pstd}
{cmd:xttrans}, another generalization of {helpb tabulate}, reports transition
probabilities (the change in a single categorical variable over time).


{title:Options for xttab}

{dlgtab:Main}

{phang}
{opth "i(varname:varname_i)"} specifies the variable name that contains the
unit to which the observation belongs; see {help xt}.


{title:Options for xttrans}

{dlgtab:Main}

{phang}
{opth "i(varname:varname_i)"} specifies the variable name that contains the
unit to which the observation belongs; see {help xt}.

{phang}
{opth "t(varname:varname_t)"} specifies the variable name that contains the
time at which the observation was made; see {help xt}.

{phang}
{opt freq}, allowed with {cmd:xttrans} only, specifies that
frequencies as well as transition probabilities be displayed.


{title:Examples}

    {cmd:. iis id}
    {cmd:. tis year}

    {cmd:. xttab race}
    {cmd:. xttab married}

    {cmd:. xttrans married}


{title:Also see}

{psee}
Manual:  {bf:[XT] xttab}

{psee}
Online:  {help xt}, {helpb xtdes}, {helpb xtsum}
{p_end}