r - Time series is throwing up error message -


i trying conduct time series analysis based on dataset:

time    point_y point_x 00:00   106.78  207.44 00:30   106.61  207.6 01:00   103.72  208.33 01:30   102.57  207.35 02:00   102.27  206.3 02:30   101.6   206.43 03:00   100.66  206.73 03:30   101.11  206.5 04:00   100.95  206.63 04:30   102.02  206.27 05:00   105.83  207.93 05:30   106.98  207.15 06:00   107.32  206.28 06:30   108.36  204.7 07:00   107.97  203.41 07:30   107.76  202.63 08:00   107.85  201.13 08:30   107.6   198.74

it has been set as: 

austriacus<-read.table("austriacus.txt",header=t).

the time series function: x.ts<-ts(point_x,time) not working , producing following error message: error in is.data.frame(data) : object 'point_x' not found

any ideas on this?

try zoo , chron packages:

lines <- "time    point_y point_x 00:00   106.78  207.44 00:30   106.61  207.6 01:00   103.72  208.33 01:30   102.57  207.35 02:00   102.27  206.3 02:30   101.6   206.43 03:00   100.66  206.73 03:30   101.11  206.5 04:00   100.95  206.63 04:30   102.02  206.27 05:00   105.83  207.93 05:30   106.98  207.15 06:00   107.32  206.28 06:30   108.36  204.7 07:00   107.97  203.41 07:30   107.76  202.63 08:00   107.85  201.13 08:30   107.6   198.74 "  library(zoo) library(chron) to.times <- function(x) times(paste0(x, ":00"))  # z <- read.zoo("myfile", header = true, fun = to.times) z <- read.zoo(text = lines, header = true, fun = to.times)  plot(z)

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