search for: isopix

Hi,all I only got the time data such as: tms<-c("19:30:23","18:39:10".....) I want to manipulate this time series data. For example, plus one second(or minute) or minus one second This data only has the time(h:m:s), without the date. I know that there are chron package, ISOPix class and the timeDate class, but all these class need the input of date. How can we manipulate the time data without the date? Thanks advance Ted -- View this message in context: http://www.nabble.com/How-to-manipulate-the-time-data-without-the-date--tp20365370p20365370.html Sent from the R h...