compress.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}
{* 16dec2004}{...}
{cmd:help compress}{right:dialog:  {bf:{dialog compress}}}
{hline}

{title:Title}

{p2colset 5 21 23 2}{...}
{p2col :{hi:[D] compress} {hline 2}}Compress data in memory{p_end}
{p2colreset}{...}


{title:Syntax}

	{cmd:compress} [{varlist}]


{title:Description}

{pstd}
{opt compress} attempts to reduce the amount of memory used by your data.


{title:Remarks}

{pstd}
{opt compress} reduces the size of your dataset by considering demoting

{p 8 23 2}{cmd:double}s{space 3}to{space 3}{cmd:long}s, {cmd:int}s, or
	{cmd:byte}s{p_end}
{p 8 23 2}{cmd:float}s{space 4}to{space 3}{cmd:int}s or {cmd:byte}s{p_end}
{p 8 23 2}{cmd:long}s{space 5}to{space 3}{cmd:int}s or {cmd:byte}s{p_end}
{p 8 23 2}{cmd:int}s{space 6}to{space 3}{cmd:byte}s{p_end}
{p 8 23 2}{cmd:str}ings{space 3}to{space 3}shorter {cmd:str}ings

{pin}
See {help data types} for an explanation of these storage types.

{pstd}
{opt compress} leaves your data logically unchanged but (probably) appreciably
smaller.  {opt compress} never makes a mistake, results in loss of precision,
or hacks off strings.



{title:Example}

{phang}{cmd:. compress}


{title:Also see}

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

{psee}
Online:  {help data types}, {helpb recast}
{p_end}