| char2num {lazy.tools} | R Documentation |
Convert character vector to numeric vector or vice versa.
char2num(char) num2char(num)
char |
a character vector consisting of strings |
num |
a numeric vector which can be converted to string via raw conversion. |
Since these functions can handle double byte characters,
they can be used to store the strings with double byte characters
as a list of numeric vectors.
The core part of these functions are:
char to num
num <- as.numeric( charToRaw(char) )
num to char
char <- rawToChar( as.raw( num ) )
char2num
If char is a string ( a vector of length 1 ), num is a vector.
Otherwise, num is a list of length(char)
num2char
If num is a vector, char is a string.
Otherwise, char is a vector of length(num)
# char is a string
( char <- "This is an example." )
( num <- char2num( char ) )
( is.numeric(num) )
( char2 <- num2char( num ) )
# char is a string vector
( char2 <- c("This is an example.", "2nd line") )
( num2 <- char2num( char2 ) )
( sapply( num2, is.numeric ) )
( char22 <- num2char( num2 ) )
# storing double byte characters in a package: \cr
# See the description of 'generate_zenkaku_sets'.
nn <- c(142,132,146,66,130,205,150,162,230,250,136,234,144,252,129,73)
num2char(nn)