I'm trying to convert the date format from yyyy/MM/dd to dd/MM/yyyy. The year and month are getting changed without error but the value of date is different, like if the original date is 1992/12/02, it is getting converted as 334/12/1992. Any insight on this will be helpful.
import datetime
sample_date = "1992/12/02"
sample_date = datetime.datetime.strptime(sample_date, "%Y/%m/%d").strftime("%Y/%d/%m")
print(sample_date)
Output:
1992/02/12
Related
Say I want to store 1 February, 2003 as a date using a day-month-year without century format and I do the following:
> date <- as.Date("01-02-03", format = "%d-%m-%y")
And then I forget what format that date was in, and do this:
> date
[1] "2003-02-01"
In order to determine if 01 is the month or the day, I can do this:
> format(date, "%d")
[1] "01"
But is there a way to directly retrieve the format this date was stored in?
R only stores dates Date objects in one format. And technically it's a numeric format. The value is only formatted to look like a date when you print() the value. There is no formatting stored with the Date object. For example
dput(as.Date("2003-02-01"))
# structure(12084, class = "Date")
Dates are always printed yyyy-mm-dd ISO style when using the default print method. You can change that by using format() or strftime(). But the internal representation is always the same.
I want the system output to be: 14FEB18:11:53:49. I'm applying the format: datetime. But the output is 01JAN60:05:53:49.
data test;
date = today();
format date datetime.;
run;
try below. Your applying datetime format to date and hence your getting wrong result. In sas if you see anything with 1960 as year most of the time, it because you are reading data wrongly or make a wrong calculation on date. Today() gives current date whereas datetime() gives current datetime.
data test;
date = datetime();
format date datetime.;
run;
I am attempting to convert a column in my data set from fctr to date format. The current column has data formatted as follows: "01/01/14. 01:00 Am." Ideally I would like to create a column for day and then a column for time as well. There are periods following the day and the time which is another issue I am facing. So far I have attempted to use lubridate to create a new column of data but I get the error "All formats failed to parse. No formats found." Any help would be greatly appreciated, thank you.
test <- fourteen %>%
mutate(When = mdy_hms(V3))
View(test)
If your date factor literally has levels that look like 01/01/14. 01:00 Am. including two periods and a space between the first period and the first hour digits and a space between the minutes and the am/pm designation, and all the dates are in this format, then the following should work:
... mutate(When = as.POSIXct(V3, format="%m/%d/%y. %H:%M %p.")) ...
In particular, the following standalone testcase works fine:
as.POSIXct(factor("01/01/14. 01:00 Am."), format="%m/%d/%y. %H:%M %p.")
For more information on the format argument being used here, see the R help page for the function strftime.
I'm having trouble changing date format in R. I have a vector "StartDate" with dates and time for instance in the format:
01Feb1991 00:00
I did:
as.POSIXct(as.character(bio$StartDate), format = "%d/%m/%Y %H:%M")
...but I got NAs as a result. Would there be a different way to change the vector into date format?
The format you provide has to match your string. In your case, that's '%d%b%Y %H:%M' (you don't have slashes between day, month and year, and your month is the abbreviated name, not the number).
as.POSIXct('01Feb1991 00:00', format='%d%b%Y %H:%M')
See ?strptime (mentioned in ?as.POSIXct) for various tokens you can use for dates.
I am running into some date issues when working with Dates in R.
Here's my situation-
I have a data set based on dates and finally got the Date field converted from character to Date in R using the following code
o1$Date <- as.Date(o1$Date , "%m/%d/%y")
(My dataset is o1 and Date is the name of my Date column)
My Date column has the following values
"1/1/2013" "1/1/2014" "1/10/2013" "1/10/2014" "1/11/2013" "1/11/2014"
However when I convert the Char to Date I get the following Dates
"2020-01-01" "2020-01-01" "2020-01-10" "2020-01-10" "2020-01-11"
Any suggestions on what the problem could be and how to work around it?
look at ?strptime to see the formatting options for times and dates. You need to use %Y rather than %y which is for a 2 digit year.