Convert from excel time number to R POSIXct type.

convertToDateTime(x, origin = "1900-01-01", ...)

Arguments

x	A numeric vector
origin	date. Default value is for Windows Excel 2010
...	Additional parameters passed to as.POSIXct

Details

Excel stores dates as number of days from some origin date

Examples

## 2014-07-01, 2014-06-30, 2014-06-29
x <- c(41821.8127314815, 41820.8127314815, NA, 41819, NaN)
convertToDateTime(x)
#> [1] "2014-07-01 19:30:20 UTC" "2014-06-30 19:30:20 UTC"
#> [3] NA                        "2014-06-29 00:00:00 UTC"
#> [5] NA                       
convertToDateTime(x, tz = "Australia/Perth")
#> [1] "2014-07-01 11:30:20 UTC" "2014-06-30 11:30:20 UTC"
#> [3] NA                        "2014-06-28 16:00:00 UTC"
#> [5] NA                       
convertToDateTime(x, tz = "UTC")
#> [1] "2014-07-01 19:30:20 UTC" "2014-06-30 19:30:20 UTC"
#> [3] NA                        "2014-06-29 00:00:00 UTC"
#> [5] NA