This question already has answers here:
Converting date in Year.decimal form in R
(2 answers)
Closed 3 years ago.
I have one column(date) in numeric format. I want to extract date in the format of (day, month) from numeric numbers in the table. The table name in ABC and column name is Date.
Date(sample)
95.00000
95.08333
95.16667
95.25000
95.33333
95.41667
Q: Shall I first convert numeric numbers to date class and then extract date?
Can anyone help with this?
This should do the trick in base R :
format(as.Date(as.numeric(Sys.Date()), origin = "1970-01-01"), "(%d, %m)")
#(26, 02)
Related
This question already has answers here:
Converting a character string into a date in R
(2 answers)
Closed last year.
How can I convert string"15081947" to a valid date format "1947-08-15" using R?
Very handy is the lubridate package. There it would be e.g. dmy("15081947").
This question already has answers here:
Convert integer to class Date
(3 answers)
Closed 2 years ago.
I have a very simple question
I have this value:
x <- 19630730
with class numeric. The as.Date() does not give me the expected result: 1963-07-30
what is the potential remedy to convert x to a date?
Thanks
Convert to character first
x <- 19630730
as.Date(as.character(x), "%Y%m%d")
#[1] "1963-07-30"
If you use lubridate::ymd you don't need to convert to character.
lubridate::ymd(x)
This question already has answers here:
How to convert a factor to integer\numeric without loss of information?
(12 answers)
as.numeric with comma decimal separators?
(7 answers)
Closed 3 years ago.
I´m sure this is simple, but I couldn´t find the right answer to my specific problem.
I have a data frame in R. The first column has a DateTime (POSIXct) format.
The values in all the other columns have the format "factor".
Since all of the values in these columns are numbers I want to convert them in to a numeric format.
An additional problem is that since I´m from europe the numbers (factors) have "," as a decimal mark.
How do I convert these columns in to a numeric format?
This question already has answers here:
How to convert Excel date format to proper date in R
(5 answers)
Closed 4 years ago.
I am new to R.
How to format a column which contains over 1000 records of dates(this is the format i am looking for 2016-01-05, 2016-04-12).
After importing the excel file in to R, above dates have changed to 16896 16903 and so on, what is the best way to format it.
library(lubridate)
date <- ymd("2016-01-05")
this will do the trick for you. change the date with you column name
This question already has answers here:
integer data frame to date in R [duplicate]
(3 answers)
Closed 4 years ago.
My raw data file have the date columns with numbers like "180410". These are read as integers when I import the data into R. Now I tried converting them to dates using as.date but I got only N/A in these columns. Is there a way to covert them to actual dates? Please help
You need to check the format part of as.Date, it needs to match the input (2 digit year, and no spacing). If you have the wrong input you get NA. The following example produces NA because there are no hyphens in your input:
as.Date("180412", "%y-%m-%d")
Use this instead:
as.Date("180412", "%y%m%d")