y_dates.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}
{p 0 4}
{help contents:Top}
> {help y_basics:Basics}
> {help y_syntax:Syntax}
> {help y_expressions:Expressions and functions}
> {help y_functions:Functions}
{bind:> {bf:Date functions}}
{p_end}
{hline}

{title:Help file listings}

{p 4 8 4}
{bf:{help dates:Overview of dates}}{break}
    Stata stores dates as number of days since 1jan1960

{p 4 8 4}
{bf:{help date_functions:Overview of date functions}}{break}
    lists all the date functions (more detailed help below)

{p 4 8 4}
{bf:{help datefcn:Translating dates from strings}}{break}
    {cmd:date(}{it:str_to_translate}{cmd:,} {it:pattern_str}{cmd:)}

{p 4 8 4}
{bf:{help mdyfcn:Creating dates from month, day, and year variables}}{break}
    {cmd:mdy(}{it:month_exp}{cmd:,}
    {it:day_exp}{cmd:,}
    {it:year_exp}{cmd:)}

{p 4 8 4}
{bf:{help dfcn:Typing fixed dates in expressions}}{break}
    such as {cmd:d(21jan1952)}

{p 4 8 4}
{bf:{help dexfcns:Extracting month, day, year, etc. from a date}}{break}
    {cmd:month(}{it:date_exp}{cmd:)},
    {cmd:day(}{it:date_exp}{cmd:)},
    {cmd:year(}{it:date_exp}{cmd:)}, ...

{p 4 8 4}
{bf:{help dfmt:Details about the %d date format}}{break}
    display 21jan1952, 1/21/1952, January 21, 1952, or ...?


{title:Related categories}

{p 4 8}
{help y_expressions:Expressions and functions}
> {help y_functions:Functions}
> {bf:{help y_ts2:Time-series functions}}
{p_end}

{hline}