plot.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}
{* 11mar2005}{...}
{cmd:help plot}{right:dialog:  {bf:{dialog plot}}        }
{right:also see:  {help undocumented}}
{hline}

{title:Title}

{p 4 14 2}
{hi:plot} {hline 2} Draw scatterplot using typewriter characters


{title:Syntax}

{p 8 13 2}{cmdab:pl:ot} {it:yvar1} [{it:yvar2} [{it:yvar3}]] {it:xvar}
[{cmd:if} {it:exp}] [{cmd:in} {it:range}] [{cmd:,}
{cmdab:c:olumns:(}{it:#}{cmd:)} {cmdab:e:ncode}
{cmdab:h:lines:(}{it:#}{cmd:)} {cmdab:l:ines:(}{it:#}{cmd:)}
{cmdab:v:lines:(}{it:#}{cmd:)} ]

{pstd}
{cmd:by} {it:...} {cmd::} may be used with {cmd:plot}; see {helpb by}.


{title:Description}

{pstd}
{cmd:plot} produces a two-way scatterplot of {it:yvar} against {it:xvar}
using typewriter characters.  If more than one {it:yvar} is specified, a
single diagram is produced that overlays the plot of each.

{pstd}
{cmd:graph} provides more sophisticated capabilities than does {cmd:plot};
see {helpb graph}.


{title:Options}

{phang}{cmd:columns(}{it:#}{cmd:)}, 30<= {it:#} <=133, specifies the column
width of the plot; the default is 75.  Note that the plot itself occupies ten
fewer columns than the number specified.  The extra ten columns are used to
label the diagram.

{phang}{cmd:encode} plots points that occur more than once with a symbol
representing the number of occurrences.  Points that occur once are plotted
with "{hi:*}", twice with "{hi:2}", thrice with "{hi:3}", and so on.
Points that occur ten times are plotted with "{hi:A}", eleven with "{hi:B}",
and so on.  {cmd:encode} may not be specified with more than one {it:yvar}.

{phang}{cmd:hlines(}{it:#}{cmd:)} causes a line of dashes ({cmd:-}) to be
drawn across the diagram every {it:#}th line.

{phang}{cmd:lines(}{it:#}{cmd:)}, 10<= {it:#} <=83, specifies the line height
of the plot; the default is 23.  Note that the plot itself occupies
three fewer lines than the number specified.  The three extra lines are used
to label the diagram.

{phang}{cmd:vlines(}{it:#}{cmd:)} causes a vertical line of bars ({hi:|}) to
be drawn on the diagram every {it:#}th column.


{title:Examples}

    {cmd:. plot mpg weight}

    {cmd:. plot brate drate medage}


{title:Also see}

{psee}
Online:  {helpb graph}
{p_end}