Message-ID: <298a6f61001300308y6571c093j98277cb09551cd97@mail.gmail.com>
Date: 2010-01-30T11:08:58Z
From: e-letter
Subject: use zoo package with multiple column data sets
In-Reply-To: <971536df1001290640p553d8fb0u1e4c4669ddec4cd5@mail.gmail.com>
> library(chron)
> library(zoo)
> z1<-read.zoo("~/path/to/test1.csv",header=TRUE,sep=",",FUN=times)
> z2<-read.zoo("~/path/to/test2.csv",header=TRUE,sep=",",FUN=times)
> z3<-(na.approx(merge(z1,z2),time(z1)))
Error in approx(along[!na], y[!na], along[na], ...) :
need at least two non-NA values to interpolate
> z3<-(na.approx(merge(z1,z2[,2]),time(z1)))
Error in approx(along[!na], y[!na], along[na], ...) :
need at least two non-NA values to interpolate
> z3<-(na.approx(merge(z1,z2[,3]),time(z1)))
Error in `[.zoo`(z2, , 3) : subscript out of bounds
> z4<-read.zoo(textConnection(z2),FUN=times)
Error in textConnection(z2) : invalid 'text' argument