![]() ![]() # (Atlantic Standard Time or in R 'America/Puerto_Rico') # POSIXct is a number but POSIXlt is a vector of a lot of pieces of info.įormat(UTCTime_ct, tz = "America/Puerto_Rico") # What's the local time? UTCtimelt = as.POSIXlt(UTCTime_ct) # POSIXlt date-time # This is how R stores the POSIXct! POSIXlt is stored as a vector # There is a 4 hour offset to get local PR time PR does not have daylightĪs.numeric(UTCTime_ct) # The number of seconds since 00:00:00 ! We have to change DATETIME_ from factor to POSIXctįirst we are going to look at a single time and get the format right. # Set the working directory to wherever the file is (change to match your ![]() 2008) Applied to Culebra VPS Location Data Step 1: Read in Culebra sample sequence getwd() # where am I now? Figuring Out Sunrise, Sunset, Dawn and Dusk from a Time Series at a Location Figuring Out Sunrise, Sunset, Dawn and Dusk from a Time Series at a Location Example of crawl Package (Johnson et al. ![]()
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