HelpersMG (version 3.6)

tide.info: Annual tide calendar for one particular location

Description

The script extracts tide information from http://tides.mobilegeographics.com/ into a data.frame. The presence of XLM package is required for this function.

Usage

tide.info(file = NULL, year = as.POSIXlt(Sys.time())$year + 1900,
  location = 0, latitude = NA, longitude = NA, tz = "")

Arguments

file

An html file from the site http://tides.mobilegeographics.com/

year

Year to get the calendar

location

Code based on http://tides.mobilegeographics.com/

latitude

The latitude of the tide information

longitude

The longitude of the tide information

tz

Timezone

Value

Return a data.frame with tide calendar: Level is the tide level, Tide is the High or Low Tide information and Date.Time is the date/time in POSIXlt format.

Details

tide.info gets the annual tide calendar for one particular location.

See Also

Other Periodic patterns of indices: index.periodic, minmax.periodic, moon.info, sun.info

Examples

# NOT RUN {
library("HelpersMG")
lat <- 5.74
long <- -54
Awala2004 <- tide.info(year=2004, longitude=long, latitude=lat, tz="America/Cayenne")
with(Awala2004, plot(Date.Time, Level, bty="n", las=1, type="l", 
xlab=paste("Year", as.POSIXlt(Date.Time[1])$year+1900), 
ylab="Tide level in m"))
# }