Transfer TODO to github issues

[hadley]

and then delete.

[garrettgman]

Here's the TODO. I transferred the issues that I think lubridate could improve. Most of the issues lubridate already handles or are the result of people not knowing how to use R:

Date related queries to R-Help

(Also the help desk article in RNews 4/1 contains info on dates)

ymd() - make R recognize dates as dates
newDate <- as.Date(result[,"Date"], "%d.%m.%y"))
data[data$date < ymd(2000-03-02),] - subset my data based on its date column
ymd() - get as.POSIXct() to recognize my data format
? - retain the date class? e.g Unlist() drops the class attribute
and ifelse(d > "1996-1-1", "1996-1-1", d) doesn not work
added - convert a date to a year + decimal (e.g. 2000-07-01 ~ 2000.4953)
new_date <- (as.POSIXct(date) - as.POSSIXct(origin)) or start point + duration - compute any date from a specified start point
R DOES - determine the weekday of any date
as.numeric(format(d, "%w")) # 0 = Sunday
# or
format(d, "%a")
# or
weekdays(d)
R DOES? - use a date value as an index in a for loop
NA - general frustration of R not recognizing dates imported from excel
year(), week() - extract year and week information from a date