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2010 Sep 02
0
extract month data automatically
Hi, I would like to extract monthly data automatically using a code.  Given are my sample data. I know how to do one by one: jan_data1 <- Pooraka_data[Pooraka_data$Month=="1",4] feb_data1 <- Pooraka_data[Pooraka_data$Month=="2",4] mar_data1 <- Pooraka_data[Pooraka_data$Month=="3",4] apr_data1 <- Pooraka_data[Pooraka_data$Month=="4",4] ... then i try: p0_mn <- function(dt) { ...