topic Re: date formats for missing day in SAS Programming

date formats for missing day

HitmonTran — Tue, 11 Jan 2022 21:16:39 GMT

Hi,

I have a date variable (character) and I want to convert it to numeric date value. however, there are some dates missing day and month. Is there a format I can easily use along with input function?

current in character format:

2009-10-14
2010-12-24
2001-03
2006-06
2012
2002-03-27
2003-02-03

I want same values but in numeric date:

2009-10-14
2010-12-24
2001-03
2006-06
2012
2002-03-27
2003-02-03

Re: date formats for missing day

PaigeMiller — Tue, 11 Jan 2022 21:24:02 GMT

The only way I know of that makes sense, is if the day is missing, assign it to 1. If the month is missing, assign it to January. Then all of your records now have a year/month/day, and you can assign a format to them. If necessary, you can also created "flag" variables to indicate if the day was missing or to indicate if the month was missing.

Re: date formats for missing day

HitmonTran — Tue, 11 Jan 2022 21:25:26 GMT

yes, that's how I would normally impute dates but this analysis is not requiring date imputation but I still need a numeric value that is equivalent.

Re: date formats for missing day

PaigeMiller — Tue, 11 Jan 2022 21:28:30 GMT

@HitmonTran wrote:
yes, that's how I would normally impute dates but this analysis is not requiring date imputation but I still need a numeric value that is equivalent.

Can you explain further? What are you going to do with this data, where you must work with some calendar information that has no day and some calendar information that has no month?

Re: date formats for missing day

Kurt_Bremser — Tue, 11 Jan 2022 21:36:11 GMT

num_date = input(substr(cats(char_date,'-01-01'),1,10),yymmdd10.);

Do this after reading your strings into a character variable of length 10.