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These functions convert dates and times recorded as strings to Stata dates. Stata dates are numbers that can be formatted so that they look like the dates you are familiar with.
6 lip 2015 · The Stata date function is smart about removing separator characters. See help datetime_translation under the section "the date function". If your dates are in v1 and in the form yyyy-mm-dd you can specify the commands: generate v2 = date(v1, "YMD") format %td v2.
Two commands, date and format, are used to convert a string date into a numeric date. Within these functions you will need to specify how the date-time information is formatted in the string. Use upper case for day, month, and year (e.g. “DMY”) but lower case if you want to specify hours, minutes or seconds (e.g. “DMYhms”).
Dates and time variables are best read as strings. You then use one of the string-to-numeric conversion functions to convert the string to an appropriate %t value:
Some components are numeric, others are strings. Create a string variable with all the components, using string() to convert the numeric components to strings. Convert the string to a numeric date/datetime. Format the numeric variable (B) November 2, 2020. 1.
functions used to obtain Stata dates, including string-to-numeric conversions and conversions among different types of dates and times. For an alphabetical listing of all the datetime functions, see[FN] Date and time functions. Stata can work with dates such as 21nov2006, with times such as 13:42:02.213, and with dates
17 gru 2015 · The two most widely used functions for translating string dates are date() and clock(). date() converts daily dates into the number of days elapsed since 01 Jan 1960. Similarly, clock() converts dates with time stamps into the number of milliseconds elapsed since 01 January 1960 00:00:00.000. For dates before 01 Jan 1960, Stata assigns negative ...
