as.Date

Dear All,

I have a data set containing year, month, day and counts as shown below:
data <- read.table("data.txt", col.names = c("year", "month", "day", "counts"))
Using the formula below, I converted the data to as date and plotted.

new.century <- data$year < 70

data$year <- ifelse(new.century, data$year + 2000, data$year + 1900)

data$date <- as.Date(ISOdate(data$year, data$month, data$day))

The form of the data is:
16 1 19 9078
16 1 20 9060
16 1 21 9090
16 1 22 9080
16 1 23 9121
16 1 24 9199
16 1 25 9289
16 1 26 9285
16 1 27 9245
16 1 28 9223
16 1 29 9298
16 1 30 9327
16 1 31 9365

Now, I wish to include time (hour) in my data. The new data is of the form:
05 01 06 14    3849
05 01 06 15    3845
05 01 06 16    3836
05 01 06 17    3847
05 01 06 18    3850
05 01 06 19    3872
05 01 06 20    3849
05 01 06 21    3860
05 01 06 22    3868
05 01 06 23    3853
05 01 07 00    3839
05 01 07 01    3842
05 01 07 02    3843
05 01 07 03    3865
05 01 07 04    3879
05 01 07 05    3876
05 01 07 06    3867
05 01 07 07    3887

I now read the data as:
data <- read.table("data.txt", col.names = c("year", "month", "day",
"counts", "hour")) and also included hour in data$date <-
as.Date(ISOdate(data$year, data$month, data$day))
i.e data$date <- as.Date(ISOdate(data$year, data$month, data$day, data$hour)).

However, these did not work.

Can you please assist be on how to get this date and time in the right
format. The right format I got without hour looks like : 2005-12-29"
"2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29"
[8696] "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29"
[8701] "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29"
[8706] "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29" "2005-12-29"

I used this in my plot. Please I want this format to include hour.

Many thanks for your help. I am just a newbe. I am not sure if this
forum is the right one. After registration, I tried to post to Nabble
forum where I registered but could not succeed.

If there is a mistake, please help/direct me to the right forum.

Best regards
Ogbos