char2dms {sp} | R Documentation |
Convert character vector to DMS-class object
Description
These two helper functions convert character vectors and decimal degree vectors to the DMS-class representation of degrees, minutes, and decimal seconds. "DMS" objects cannot contain NAs.
Usage
char2dms(from, chd = "d", chm = "'", chs = "\"")
dd2dms(dd, NS = FALSE)
Arguments
from |
character vector of degree, minute, decimal second data |
chd |
degree character terminator |
chm |
minute character terminator |
chs |
second character terminator |
dd |
numeric vector of decimal degrees |
NS |
logical, TRUE for north/south decimal degrees, FALSE for east/west decimal degrees |
Details
In char2dms, the input data vector should use a regular format, such as that used in the PROJ.4 library, with a trailing capital (NSWE) indicating compass direction.
Value
Both functions return a "DMS" object.
Methods
- from = "DMS", to = "numeric"
coerce a
"DMS"
object to a"numeric"
vector- from = "DMS", to = "character"
coerce a
"DMS"
object to a"character"
vector (theas.character.DMS
S3 method is also available)
Author(s)
Roger Bivand Roger.Bivand@nhh.no
See Also
Examples
data(state)
str(state.center$y)
stateN <- dd2dms(state.center$y, NS=TRUE)
str(attributes(stateN))
ch.stateN <- as.character(stateN)
str(ch.stateN)
stateNa <- char2dms(ch.stateN)
str(attributes(stateNa))
ch.stateN <- as(stateN, "character")
str(ch.stateN)
stateNa <- char2dms(ch.stateN)
str(attributes(stateNa))