nlist.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}
{* 09feb2005}{...}
{cmd:help nlist} ({hi:numlist} command)
{hline}

{title:Title}

{p2colset 5 20 22 2}{...}
{p2col :{hi:[P] numlist} {hline 2}}Parse numeric lists{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 16 2}
     {cmd:numlist} {cmd:"}{it:numlist}{cmd:"} [{cmd:,} {cmdab:asc:ending}
       {cmdab:desc:ending} {cmdab:int:eger} {cmdab:miss:ingokay}
       {cmd:min(}{it:#}{cmd:)} {cmd:max(}{it:#}{cmd:)}
       {cmdab:r:ange:(}{it:operator#} [{it:operator#}]{cmd:)} {cmd:sort}]

{pstd}where {it:operator} is    {cmd:<} | {cmd:<=} | {cmd:>} | {cmd:>=}

{pmore}Note there is no space between {it:operator} and {it:#}; for example, 

	{cmd:range(>=0)}
	{cmd:range(>=0 <=20)}
	{cmd:range(>0 <=50)}

{pstd}and where {it:numlist} consists of one or more
{it:{help numlist:numlist_elements}}.


{title:Description}

{pstd}
The {cmd:numlist} command expands the numeric list supplied as a string
argument and performs error checking based on the options specified.  Any
numeric sequence operators in the {it:numlist} string are evaluated, and the
expanded list of numbers is returned in {hi:r(numlist)}.  See {help numlist}
for a discussion of numeric lists.  Also see {helpb syntax} for a more
comprehensive command that will also parse numeric lists.


{title:Options}

{phang}{cmd:ascending} indicates that the user must give the numeric list in
ascending order without repeated values.  This is different from the {cmd:sort}
option.

{phang}{cmd:descending} indicates that the numeric list must be given in
descending order without repeated values.

{phang}{cmd:integer} specifies that the user may only give integer values in
the list.

{phang}{cmd:missingokay} indicates that missing values are allowed in the
numeric list.  By default, missing values are not allowed.

{phang}{cmd:min(}{it:#}{cmd:)} specifies the minimum number of elements
allowed in the numeric list.  The default is {cmd:min(1)}.  If you want to
allow empty numeric lists, specify {cmd:min(0)}.

{phang}{cmd:max(}{it:#}{cmd:)} specifies the maximum number of elements
allowed in the numeric list.  The default is {cmd:max(1600)}.

{phang}{cmd:range(}{it:operator#} [{it:operator#}]{cmd:)} specifies the
acceptable range for the values in the numeric list.  No space is allowed
between the {it:operator} and the {it:#}.

{phang}{cmd:sort} specifies that the returned numeric list is to be sorted.
This is different from the {cmd:ascending} option, which places the
responsibility for providing a sorted list on the user who will not be allowed
to enter a nonsorted list.  {cmd:sort}, on the other hand, puts no restriction
on the user and takes care of sorting the list.  Repeated values are also
allowed with {cmd:sort} .


{title:Example}

{phang}{cmd:. numlist "`nlst'" , min(2) max(40) sort integer range(<=100 >=0)}


{title:Also see}

{psee}
Manual:  {bf:[P] numlist}

{psee}
Online:  {help numlist}; {helpb syntax}
{p_end}