obs.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}
{* 29nov2004}{...}
{cmd:help obs}
{hline}

{title:Title}

{p2colset 5 16 18 2}{...}
{p2col :{hi:[D] obs} {hline 2}}Increase the number of observations in a
dataset{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 13 2}
{cmd:set}
{opt ob:s}
{it:#}


{title:Description}

{pstd}
{opt set obs} changes the number of observations in the current dataset.
{it:#} must be at least as large as the current number of observations.
If there are variables in memory, the values of all new observations are set
to missing.


{title:Examples}

{phang}{cmd:. drop _all}{space 6}(clear memory)          {p_end}
{phang}{cmd:. set obs 100}{space 4}(make 100 observations) {p_end}
{phang}{cmd:. gen x = _n}{space 5}(x = 1, 2, 3, .., 100)  {p_end}
{phang}{cmd:. gen y = x^2}{space 4}(y = 2, 4, 9, .., 10000){p_end}
{phang}{cmd:. scatter y x}{space 4}(make a graph)          {p_end}


{title:Also see}

{psee}
Manual:  {bf:[D] obs}

{psee}
Online:  {helpb describe}
{p_end}