On Tue, 7 Oct 2014 07:25:49 PM Hafizuddin Arshad wrote:
> Dear R users,
>
> I have this kind of data set which is part of my data:
>
> ...
>
> I would like to find the rainfall total for each month within a year. The
> result should be like in this form:
>
> ...
>
> where V1 until V12 as month and 1 until 80 as a years. How can I do
this in
> R?
Hi Arshad,
This might be what you want:
yearcorr<-min(raindat$Year)-1
years<-unique(raindat$Year)
rainmonth<-as.data.frame(matrix(0,nrow=2,ncol=12))
for(year in years) {
for(month in 1:12) {
if(any(raindat$Year==year&raindat$Month==month))
rainmonth[year-yearcorr,month]<-
mean(raindat$Rain[raindat$Year==year&raindat$Month==month],na.rm=TRUE)
}
}
rownames(rainmonth)<-years
names(rainmonth)<-month.abb
Jim
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