I want to sort a DF, temp, on two columns, patid and time. I have searched the
internet and found code that I was able to modify to get my data sorted.
Unfortunately I don't understand how the code works. I would appreciate it if
someone could explain to me how the code works. Among other questions, despite
reading, I don't understand how with() works, nor what it does in the current
setting.
code:
data4xsort<-temp[
with( temp, order(temp[,"patid"], temp[,"time"])),
]
Thank you,
John
John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and Geriatric
Medicine
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)
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