stem.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}
{* 26nov2005}{...}
{cmd:help stem}{right:dialog:  {bf:{dialog stem}}}
{hline}

{title:Title}

{p2colset 5 17 19 2}{...}
{p2col:{hi:[R] stem} {hline 2}}Stem-and-leaf displays{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 13 2}
{cmd:stem}
{varname}
{ifin}
[{cmd:,} {it:options}]

{synoptset 14 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Main}
{synopt:{opt p:rune}}do not print stems that have no leaves{p_end}
{synopt:{opt r:ound(#)}}round data to this value; default is {cmd:round(1)}{p_end}
{synopt:{opt d:igits(#)}}digits per leaf; default is {cmd:digits(1)}{p_end}
{synopt:{opt l:ines(#)}}number of stems per interval of 10^{cmd:digits}{p_end}
{synopt:{opt w:idth(#)}}stem width; equal to (10^{cmd:digits})/{opt width}{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
{opt by} may be used with {opt stem}; see {helpb by}.{p_end}


{title:Description}

{pstd}
{opt stem} displays stem-and-leaf plots.


{title:Options}

{dlgtab:Main}

{phang}
{opt prune} prevents printing any stems that have no leaves.

{phang}
{opt round(#)} rounds the data to this value and displays the
plot in these units.  If {opt round()} is not specified,
noninteger data will be rounded automatically.

{phang}
{opt digits(#)} sets the number of digits per leaf.  The default is 1.

{phang}
{opt lines(#)} sets the number of stems per every data
interval of 10^{cmd:digits}.  The value of {opt lines()} must divide
10^{cmd:digits}; that is, if {cmd:digits(1)} is specified, then {opt lines()}
must divide 10.  If {cmd:digits(2)} is specified, then {opt lines()}
must divide 100, etc.  Only one of {opt lines()} or {opt width()} may be specified.
If neither is specified, an appropriate value will be set automatically.

{phang}
{opt width(#)} sets the width of a stem.  {opt lines()} is equal to 
(10^{cmd:digits})/{opt width}, and this option is merely an alternate way of
setting {opt lines()}.  The value of {opt width()} must divide 10^{cmd:digits}.
Only one of {opt width()} or {opt lines()} may be specified.
If neither is specified, an appropriate value will be set automatically.

{pstd}
Note:  If {opt lines()} or {opt width()} is not specified, {opt digits()} may be
decreased in some circumstances to make a better-looking plot.  If {opt lines()}
or {opt width()} is set, the user-specified value of {opt digits()} will not be
altered.


{title:Examples}

	{cmd:. stem x}

	{txt}Stem-and-leaf plot for x

	  {res}2* | 11111
	  2t | 22222333
	  2f | 444455555
	  2s | 666
	  2. | 8889
	  3* | 001{txt}

{pstd}
Note:  The above plot is a 5-line plot ({hi:lines} = 5 and {hi:width} = 2).

	{cmd:. stem x, lines(2)}

	{txt}Stem-and-leaf plot for x

	  {res}2* | 11111222223334444
	  2. | 555556668889
	  3* | 001{txt}

{pstd}
Note:  {hi:stem x, width(5)} will produce the same plot as above.


	{cmd:. stem price, lines(1) digits(3)}

	{txt}Stem-and-leaf plot for price (Price)

	   {res}3*** | 299,667,748,799,829,895,984,995
	   4*** | 099,172,187,195,296,389,453,482,499,504,647,697
	   5*** | 079,104,799
	   6*** | 229,295,486,850
	   7*** | 140
	   8*** | 129,814
	   9*** | 735
	  10*** |
	  11*** |
	  12*** | 069{txt}

	{cmd:. stem price, lines(1) digits(3) prune}

	{txt}Stem-and-leaf plot for price (Price)

	   {res}3*** | 299,667,748,799,829,895,984,995
	   4*** | 099,172,187,195,296,389,453,482,499,504,647,697
	   5*** | 079,104,799
	   6*** | 229,295,486,850
	   7*** | 140
	   8*** | 129,814
	   9*** | 735
	  12*** | 069{txt}

	{cmd:. stem price, round(100)}

	{txt}Stem-and-leaf plot for price (Price)

	price rounded to nearest multiple of {res:100}
	plot in units of {res:100}

	   {res}3* | 377889
	   4* | 00122234555567
	   5* | 118
	   6* | 2359
	   7* | 1
	   8* | 18
	   9* | 7
	  10* |
	  11* |
	  12* | 1{txt}


{title:Also see}

{psee}
Manual:  {bf:[R] stem}

{psee}
Online:  {helpb histogram}, {helpb lv}
{p_end}