Re: [R] Pulling data based on the quater

Hi Raghu, Using the example you provided. If you want Q3 for year 2011 and 2013. dat[grep("2011 Q3|2013 Q3", Qtr1),] #change accordingly #    ID Phase RESEARCH Area  Date   Result #1  100    IV   S_Care  A&P 7/23/2013 Positive #5 2005    IV    Speci   TH  8/4/2011 #6 2006   III    Speci 

Re: [R] Pulling data based on the quater

Hi, Please Check ?as.yearqtr() fromlibrary(zoo) dat <- read.table(text="ID  Phase RESEARCH Area   Date Result 100   IV S_Care A&P 7/23/2013 Positive 1001   IV P_Care EU 12/20/2012 Positive 2001   IV Car    AS 9/13/2012 Positive 20003   III Spec IN 10/6/2011