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longwood
2010 Aug 11
0
sweep and zoo objects
...heck.margin=TRUE, ...)
so in my example x would be a long yearmon zoo object with the same
column names
as MYZOO above, but decades of data. MARGIN would be rows and the STATS
to sweep out would be the values in MYZOO.
test3<-matrix(seq(1,720, by=1), ncol=10)
p<-zoo(test3[,1], freq=12)
longzoo<-merge(p,test3[,2:10])
colnames(longzoo)<-row.names(test)
what we want to do is to sweep out MYZOO from longzoo. I could just repeat
the data in MYZOO 6 times and then subtract MYZOO from longzoo, but thats
a potential memory buster in this situation
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2010 Aug 11
2
Sweeping a zoo series
Given a long zoo matrix, the goal is to "sweep" out a statistic from the
entire length of the
sequences.
longzoomatrix<-zoo(matrix(rnorm(720),ncol=6),as.yearmon(outer(1900,seq(0,length=120)/12,"+")))
cnames<-c(12345,23456,34567,45678,56789,67890)
colnames(longzoomatrix)<-cnames
longzoomatrix[1:24,]
12345 23456 34567 45678 56789
67890
Jan 1900 -0.17...