Format date as Year/Quarter

Question

I have the following dataframe:

Data <- data.frame(
  date = c(\"2001-01-01\", \"2001-02-01\", \"2001-03-01\", \"2001-04-01\", \"2001-05-01\", \"2001-06-0         


        

Answer 1

yq=function(x,prefix="%Y",combine="Q") paste0(ifelse(is.null(prefix),"",format(x,"%Y")),floor(as.numeric(format(x,"%m"))/3-1e-3)+1,sep=combine)

this gives the flexibility of returning any format back that has the quarter in it

no need for chron or zoo

as for your example

yq(as.Date("2013-04-30"),prefix="%y",combine="/0")
> [1] "13/02"