Goodmorning everybody!
I'm struggling a bit with R and the good book R IN ACTION: Data analysis and graphics with R. Searching the web hasn't resulted in any valuable effort, and neither reading the 'man' page for as.Date.
PROBLEM
I've this input in R: date <- c("10/24/08","10/28/08","10/1/08","10/12/08","5/1/09")
which then is used to create a data.frame named leadership as follow:
manager <- c(1,2,3,4,5)
country <- c("US","US","UK","UK","UK")
gender <- c("M","F","F","M","F")
age <- c(32,45,25,39,99)
q1 <- c(5,3,3,3,2)
q2 <- c(4,5,5,3,2)
q3 <- c(5,2,5,4,1)
q4 <- c(5,5,5,NA,2)
q5 <- c(5,5,2,NA,1)
leadership <- data.frame(manager, date, country, gender, age, q1,q2,q3,q4,q5, stringsAsFactors=F)
If i print it out, what I get is:
manager date country gender age q1 q2 q3 q4 q5
1 1 10/24/08 US M 32 5 4 5 5 5
2 2 10/28/08 US F 45 3 5 2 5 5
3 3 10/1/08 UK F 25 3 5 5 5 2
4 4 10/12/08 UK M 39 3 3 4 NA NA
5 5 5/1/09 UK F 99 2 2 1 2 1
and
str(leadership)
'data.frame': 5 obs. of 10 variables:
$ manager: num 1 2 3 4 5
$ date : chr "10/24/08" "10/28/08" "10/1/08" "10/12/08" ...
$ country: chr "US" "US" "UK" "UK" ...
$ gender : chr "M" "F" "F" "M" ...
$ age : num 32 45 25 39 99
$ q1 : num 5 3 3 3 2
$ q2 : num 4 5 5 3 2
$ q3 : num 5 2 5 4 1
$ q4 : num 5 5 5 NA 2
$ q5 : num 5 5 2 NA 1
I need then to change the variable date format
leadership$date <- as.Date(leadership$date, format="%m/%d/%y")
leadership
manager date country gender age q1 q2 q3 q4 q5
1 1 2008-10-24 US M 32 5 4 5 5 5
2 2 2008-10-28 US F 45 3 5 2 5 5
3 3 2008-10-01 UK F 25 3 5 5 5 2
4 4 2008-10-12 UK M 39 3 3 4 NA NA
5 5 2009-05-01 UK F 99 2 2 1 2 1
Now I'd like, is the date column of my data.frame to be displayed in the italian format: day/month/year, such as (the first observation) 24/10/08. So I issue the following command:
format(leadership$date, "%d/%m/%y")
[1] "24/10/08" "28/10/08" "01/10/08" "12/10/08" "01/05/09"
That makes it as desired. But if I print the data.frame again, what I get is not what I want, even though the data format should have been correctly set:
leadership
manager date country gender age q1 q2 q3 q4 q5
1 1 2008-10-24 US M 32 5 4 5 5 5
2 2 2008-10-28 US F 45 3 5 2 5 5
3 3 2008-10-01 UK F 25 3 5 5 5 2
4 4 2008-10-12 UK M 39 3 3 4 NA NA
5 5 2009-05-01 UK F 99 2 2 1 2 1
str(leadership)
'data.frame': 5 obs. of 10 variables:
$ manager: num 1 2 3 4 5
$ date : Date, format: "2008-10-24" "2008-10-28" ...
$ country: chr "US" "US" "UK" "UK" ...
$ gender : chr "M" "F" "F" "M" ...
$ age : num 32 45 25 39 99
$ q1 : num 5 3 3 3 2
$ q2 : num 4 5 5 3 2
$ q3 : num 5 2 5 4 1
$ q4 : num 5 5 5 NA 2
$ q5 : num 5 5 2 NA 1
I really don't know how to set it correctly. My locale is:
Sys.getlocale()
[1] "LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=it_IT.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=it_IT.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=it_IT.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=it_IT.UTF-8;LC_IDENTIFICATION=C")
Time format here is already in the 'italian-style'..
For reference, I'm running Ubuntu 16.04.2 LTS and
R version 3.3.3 (2017-03-06) -- "Another Canoe" Platform: x86_64-pc-linux-gnu (64-bit)
Hence: how can I modify the date column to be displayed as I'd like?
Thanks in advance and sorry for me being so long-winded! Cheers! =-P
