twoway_options.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}
{* 01mar2005}{...}
{cmd:help twoway_options}
{hline}

{title:Title}

{p2colset 5 27 29 2}{...}
{p2col :{hi:[G] {it:twoway_options}} {hline 2}}Options for twoway graphs{p_end}
{p2colreset}{...}


{title:Syntax}

{pstd}
The {it:twoway_options} allowed with all {cmd:twoway} graphs are

	{it:twoway_options}{col 39}description
	{hline 69}
	{it:{help added_line_options}}{...}
{col 39}draw lines at specified {it:y} or {it:x} values
	{it:{help added_text_option}}{...}
{col 39}display text at specified ({it:y},{it:x}) value

	{it:{help axis_options}}{...}
{col 39}labels, ticks, grids, log scales
	{it:{help title_options}}{...}
{col 39}titles, subtitles, notes, captions
	{it:{help legend_option}}{...}
{col 39}legend explaining what means what

	{help scale_option:{bf:scale(}{it:#}{bf:)}}{...}
{col 39}resize text, markers, and line widths
	{it:{help region_options}}{...}
{col 39}outlining, shading, graph size
	{it:{help aspect_option}}{...}
{col 39}constrain aspect ratio of plot region
	{help scheme_option:{bf:scheme(}{it:schemename}{cmd:)}}{...}
{col 39}overall look

	{help by_option:{bf:by(}{it:varlist}{bf:, ...)}}{...}
{col 39}repeat for subgroups
	{help nodraw_option:{bf:nodraw}}{...}
{col 39}suppress display of graph
	{help name_option:{bf:name(}{it:name}{bf:, ...)}}{...}
{col 39}specify name for graph
	{help saving_option:{bf:saving(}{it:filename}{bf:, ...)}}{...}
{col 39}save graph in file

	{it:{help advanced_options}}{...}
{col 39}difficult to explain
	{hline 69}


{title:Description}

{pstd}
The above options are allowed with all {cmd:twoway} plots, {cmd:scatter},
{cmd:line}, ...


{title:Options}

{phang}
{it:added_line_options}
    specify that horizontal or vertical lines be drawn on the graph; see 
    {it:{help added_line_options}}.  If your interest is in drawing grid lines
    through the plot region, see {it:axis_options} below.

{phang}
{it:added_text_option}
    specifies text to be displayed on the graph (inside the plot region);
    see {it:{help added_text_option}}.

{phang}
{it:axis_options}
    specify how the axes are to look, including values to be labeled or ticked
    on the axes.  These options also allow you to obtain logarithmic scales
    and grid lines.  See {it:{help axis_options}}.

{phang}
{it:title_options}
        allow you to specify titles, subtitles, notes, and captions
        to be placed on the graph; see {it:{help title_options}}.

{phang}
{it:legend_option}
    specifies whether a legend is to appear and allows you to modify the
    legend's contents.
    See {it:{help legend_option}}.

{phang}
{cmd:scale(}{it:#}{cmd:)}
    specifies a multiplier that affects the size of all text, markers, and
    line widths in a graph.  {cmd:scale(1)} is the default, and
    {cmd:scale(1.2)} would make all text, markers, and line widths 20% larger.
    See {it:{help scale_option}}.

{phang}
{it:region_options}
    allow outlining the plot region (such as placing or suppressing a border
    around the graph), specifying a background shading for the region, and 
    controlling the graph size.  See {it:{help region_options}}.

{phang}
{it:aspect_option}
    allows you to add control the relationship between the height and width of
    a graph's plot region; see {it:{help aspect_option}}.

{phang}
{cmd:scheme(}{it:schemename}{cmd:)}
    specifies the overall look of the graph;
    see {it:{help scheme_option}}.

{phang}
{cmd:by(}{it:varlist}{cmd:,} ...{cmd:)}
    specifies that the plot be repeated for each set of values of
    {it:varlist}; see {it:{help by_option}}.

{phang}
{cmd:nodraw}
    causes the graph to be constructed but not displayed;
    see {it:{help nodraw_option}}.

{phang}
{cmd:name(}{it:name}[{cmd:, replace}]{cmd:)}
    specifies the name of the graph.  {cmd:name(Graph, replace)} is the default.
    See {it:{help name_option}}.

{phang}
    {cmd:saving(}{it:filename}[{cmd:, asis replace}]{cmd:)}
    specifies that the graph be saved as {it:filename}.  If {it:filename}
    is specified without an extension, {cmd:.gph} is assumed.
    {cmd:asis} specifies that the graph be saved just as it is.
    {cmd:replace} specifies that, if the file already exists, it is okay
    to replace it.
    See {it:{help saving_option}}.

{phang}
{it:advanced_options}
    are not so much advanced as they are difficult to explain and are
    rarely used.  They are also invaluable when you need them; see 
    {it:{help advanced_options}}.


{title:Remarks}

{pstd}
The above options may be used with any of the {cmd:twoway}
plottypes{hline 2}see {helpb twoway}{hline 2}for instance,

	{cmd:. twoway scatter mpg weight, by(foreign)}

{phang2}
	{cmd:. twoway line le year, xlabel(,grid) saving(myfile, replace)}

{pstd}
The above options are options of {cmd:twoway}, meaning that
they affect the entire twoway graph and not just one or the other of the plots
on it.  For instance, in

	{cmd}. twoway lfitci  mpg weight, stdf ||
		 scatter mpg weight, ms(O) by(foreign, total row(1)){txt}

{pstd}
the {cmd:by()} option applies to the entire graph and in theory you should
type

	{cmd}. twoway lfitci  mpg weight, stdf  ||
		 scatter mpg weight, ms(O) ||, by(foreign, total row(1)){txt}

{pstd}
or

	{cmd}. twoway (lfitci  mpg weight, stdf)
		 (scatter mpg weight, ms(O)), by(foreign, total row(1)){txt}

{pstd}
to demonstrate your understanding of that fact.  You need not do that, however,
and in fact it does not matter to which plot you attach the
{it:twoway} {it:options}.
You could even type

	{cmd}. twoway lfitci  mpg weight, stdf by(foreign, total row(1)) ||
		 scatter mpg weight, ms(O){txt}

{pstd}
and, when specifying multiple {it:twoway_options}, you could even attach
some to one plot and the others to another:

	{cmd}. twoway lfitci  mpg weight, stdf by(foreign, total row(1)) ||
		 scatter mpg weight, ms(O) saving(myfile){txt}


{title:Also see}

{psee}
Manual:  {bf:[G] {it:twoway_options}}

{psee}
Online:  {helpb twoway};
{it:{help axis_options}},
{it:{help title_options}},
{it:{help legend_option}},
{it:{help scale_option}},
{it:{help region_options}},
{it:{help scheme_option}},
{it:{help by_option}},
{it:{help nodraw_option}},
{it:{help name_option}},
{it:{help saving_option}},
{it:{help advanced_options}}
{p_end}