Age intck year dob eventdate continuous hi i was wondering if two methods above have the same function on calculating age based on dob.
Sas age calculation floor.
The precision of the memberdateofbirth a stored sas date variable was causing the age15 variable to resolve to 18 with no decimal places.
Therefore with the floorz function you might get unexpected results.
For example and while.
In mathematics and computer science the floor function is the function that takes as input a real number and gives as output the greatest integer less than or equal to denoted or similarly the ceiling function maps to the least integer greater than or equal to denoted or.
The use of yrdif function is detailed in the sas online document.
Calculate age from birth date posted 02 07 2018 01 07 pm 12008.
To compute age using a date of birth and the current.
1 like 14 replies 14.
The floorz function does not fuzz the result.
Based on the outputs the calculation using yrdif seems to be a good option.
Age floor yrdif datepart birth date today age view solution in original post.
For example the following lines.
The approach is to first calculate the number of completed months between the two dates and then divide by 12.
Susan lamented the subtle issues using the yrdif function exactly 1 0356164384 years ago.
The simple way using 365 25 as divider is actually a pretty good option.
Unlike the floorz function the floor function fuzzes the result.
The macro is used in a sas data step as follows.
Sure you could write your own function for calculating such things as i suggested 0 1753424658 years ago.
Computing ages with yrdif the sas help and documentation states that the yrdif function returns the difference in years between two dates since age is the difference in years between two dates a birth date and some other date the yrdif function has been used to compute ages in this way.
If the argument is within 1e 12 of an integer the floor function fuzzes the result to be equal to that integer.
How can you reliably compute the age of someone or something.
It seems like such a simple problem.
For an adult study all of these approaches in calculating age seem to be ok.
Will cause the following message to be placed on the log.
There is also an article in sas blog discussing this.
