str_arithmetic {tinycodet}R Documentation

String Arithmetic Operators

Description

String arithmetic operators.

The x %s+% y operator is exported from 'stringi', and concatenates character vectors x and y.

The x %s-% p operator removes character/pattern defined in p from x.

The x %s*% n operator is exported from 'stringi', and duplicates each string in x n times, and concatenates the results.

The x %s/% p operator counts how often regular expression or character pattern p occurs in each element of x.

The x %s//% brk operator counts how often the text boundary specified in list brk occurs in each element of x.

The e1 %s$% e2 operator is exported from 'stringi', and provides access to stri_sprintf in the form of an infix operator.

Usage

x %s-% p

x %s/% p

x %s//% brk

Arguments

x

a string or character vector.

p

either a list with 'stringi' arguments (see s_regex), or else a character vector of the same length as x with regular expressions.
[REGEX]
[FIXED]
[COLL]
[CHARCLASS]

brk

a list with arguments to be send to stri_count_boundaries.
see also stri_opts_brkiter.
[BOUNDARIES]

Value

The %s+%, %s-%, and %s*% operators return a character vector of the same length as x.
The %s/% and %s//% both return an integer vector of the same length as x.
The %s$% operator returns a character vector.

See Also

tinycodet_strings()

Examples

x <- c(paste0(letters[1:13], collapse=""), paste0(letters[14:26], collapse=""))
print(x)
y <- c("a", "b")
p <- rep("a|e|i|o|u", 2) # same as p <- list(regex=rep("a|e|i|o|u", 2))
n <- c(3, 2)

x %s+% y # =paste0(x,y)
x %s-% p # remove all vowels from x
x %s*% n
x %s/% p # count how often vowels appear in each string of vector x.

test <- c(
paste0("The\u00a0above-mentioned    features are very useful. ",
"Spam, spam, eggs, bacon, and spam. 123 456 789"),
"good morning, good evening, and good night"
)
test %s//% list(type = "character")


#############################################################################


x <- c(paste0(letters[1:13], collapse=""), paste0(letters[14:26], collapse=""))
print(x)
y <- "a"
# pattern that ignores case:
p <- list(regex=rep("A|E|I|O|U", 2), case_insensitive = TRUE)
n <- c(2, 3)

x %s+% y # =paste0(x,y)
x %s-% p # remove all vowels from x
x %s*% n
x %s/% p # count how often vowels appears in each string of vector x.


[Package tinycodet version 0.3.0 Index]