Displaying 1 result from an estimated 1 matches for "obs_valu".
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obs_value
2012 Sep 01
5
R_closest date
Hi,
I have encountered an issue about finding a date closest to another date
So this is how the data frame looks like:
PT_ID IDX_DT OBS_DATE DAYS_DIFF OBS_VALUE CATEGORY
13 4549 2002-08-21 2002-08-20 -1 183 2
14 4549 2002-08-21 2002-11-14 85 91 1
15 4549 2002-08-21 2003-02-18 181 89 1
16 4549 2002-08-21 2003-05-15 267 109 2
17 4549 2002-08-21 2003-12-16 482...