y_ts2.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:Time-series functions}}
{p_end}
{hline}

{title:Help file listings}

{p 4 8 4}
{bf:{help tdates:Overview of time-series dates}}{break}
    Stata stores dates as # of days since 01jan1960 or # of weeks
    since 1960w1 or # of months since 1960m1 or ...

{p 4 8 4}
{bf:{help time_series_functions:Overview of time-series functions}}{break}
    lists all the time-series functions (more detailed help below)

{p 4 8 4}
{bf:{help dlyfcns:Translating dates from strings}}{break}
    {cmd:daily()}, {cmd:weekly()}, {cmd:monthly()}, ...

{p 4 8 4}
{bf:{help ywfcns:Creating dates from year and week, year and quarter, ...}}{break}
    {cmd:yw()},
    {cmd:ym()},
    {cmd:yq()}, ...

{p 4 8 4}
{bf:{help tfcn:Typing fixed dates in expressions}}{break}
    {cmd:d(21jan1952)}, {cmd:q(1980q2)}, ...

{p 4 8 4}
{bf:{help dcfcns:Date conversion functions}}{break}
    {cmd:dofw()} (read d of w, date of week);
    {cmd:dofq()} (read d of q, date of quarter);
    {cmd:qofd()} (read q of d, quarter of date); ...

{p 4 8 4}
{bf:{help dexfcns:Extracting day, week, month, quarter, year, ...}}{break}
    {cmd:day()}, {cmd:week()}, {cmd:month()}, ...

{p 4 8 4}
{bf:{help tfmt:Details about the %t format}}{break}
    display 21jan1952, 1/21/1952, January 21, 1952, 1952q1, or ...?

{p 4 8 4}
{bf:{help tinfcn:Selecting time spans of data}}{break}
    {cmd:tin()} and {cmd:twithin()}


{title:Related categories}

{p 4 8}
{help y_expressions:Expressions and functions}
> {help y_functions:Functions}
> {bf:{help y_dates:Date functions}}
{p_end}

{hline}