It can also be used to calculate the age gap exactly, to the day, if dates of birth are supplied. The same equation can be used with years instead of ages. The ages can be whole numbers or decimals, depending on the required precision. It is used so one does not need to care about getting a negative result from the formula in case the second age is greater than the first age. Where |.| is the absolute function (ABS()) which basically removes the sign of a number. The universal formula for calculating an age difference is: "the age difference is 3 years, 6 months, and 12 days". In case dates of births were provided as input, the output will also contain the age difference in terms of full months, weeks, and days, as well as an accurate chronological difference, e.g. The result will be the age gap in terms of years. The two ages, years, or dates can be entered in any order. It is also possible to compute the year of birth given the age in years by using a time difference calculator to subtract the age from the current date. In case you know one person's age, and another person's year of birth or date of birth, it is easy to compute the second person's age by using our online age calculator. The calculator can be used to compute the age difference between any two persons, given one of the following: Desired age difference in relationships.The age gap in dating and relationships.How to use the age difference calculator.Make sure to read about the datetime/c and datetime/C data types in that help document so you know how to interpret the output when you subtract startdate1 from enddate1. The next predictable place you'll get stuck is in determining duration of time between start and end datetime variables. Generate double startdate1 = clock(startdate, "MD20Yhm") You'll also use %tc as the datetime format. Further, if you don't have a 4 digit year, you need to sneak in the century before the "Y". If you want datetime, you'll need to use "MDYhm" and the "clock" (not "date") function. Type: format startdate2 %td - Note that this isn't the format that you want since you seemingly want date and time ("datetime" in Stata speak). You just need to change the display format so that these show up as dates. If you are getting "21186", that's the Stata format for date, not date and time. This is my first time working with dates in STATA.Īh, dates and time in Stata. The codes about either produce missing values or a strange number that repeats increasing by increments of one every 14/15 observations (21186, 21187, etc).Īny help is greatly appreciated. Gen startdate2 = date(startdate, "MDY", 2018 Gen startdate2 = date(startdate, "MMDDYY", 2018) All the dates are in MDY format and the time is in 24 hour format.ġ) Do you all suggest I combine the date and time into one variable (one for Start Date & Time and one for End Date & Time)?Ģ) Separately, when trying to generate a new variable to reformat the dates in the STATA's data format it is generating incorrect dates. The data looks as follows (I can't share the actual data). I ultimately want to find out the difference between the the Start and End times. I have 4 separate variables: Start Date, Start Time, End Date, End Time. Hello, I am working on a large data set that spans over several years. Other users who have found the question cross-posted are encouraged to share the links as a reply as well. If you've asked a question, let people know where else you asked the question and what your solution(s) were! When you post a question on another platform, include those links in your questions or as a reply (if it's Discord, just mention it).See the sticked "READ ME: How to best ask for help in /r/Stata" post on how to comment here if all else fails. Make sure to include the word "Stata" in your search query. Perform a web search for your question prior to posting here. Stata's online community has been active for many years and many questions and solutions are documented on StataList, which are highly indexed on contemporary search engines (e.g., Google). Stata has extensive and complete documentation you can read before posting here (and you can type help followed by the command name in console to see it, e.g. This is not a place to find Stata tutoring. Do not request that the /r/Stata community do your homework for you. Assume good faith questions and comments. Be nice when posting or commenting to a post.The Code Block on Discord (run by Asjad Naqvi of The Stata Guide).
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