Grab Begin/End of String to/from Character
replace_to - Grab from beginning of string to a character(s).
replace_from - Grab from character(s) to end of string.
replace_to(x, char = " ", n = 1, include = FALSE, ...) replace_from(x, char = " ", n = 1, include = FALSE, ...)
x |
A character string |
char |
The character from which to grab until/from. |
n |
Number of times the character appears before the grab. |
include |
logical. If |
... |
ignored. |
returns a vector of text with begin/end of string to/from character removed.
Josh O'Brien and Tyler Rinker <tyler.rinker@gmail.com>.
## Not run:
x <- c("a_b_c_d", "1_2_3_4", "<_?_._:")
replace_to(x, "_")
replace_to(x, "_", 2)
replace_to(x, "_", 3)
replace_to(x, "_", 4)
replace_to(x, "_", 3, include=TRUE)
replace_from(x, "_")
replace_from(x, "_", 2)
replace_from(x, "_", 3)
replace_from(x, "_", 4)
replace_from(x, "_", 3, include=TRUE)
x2 <- gsub("_", " ", x)
replace_from(x2, " ", 2)
replace_to(x2, " ", 2)
x3 <- gsub("_", "\\^", x)
replace_from(x3, "^", 2)
replace_to(x3, "^", 2)
x4 <- c("_a_b", "a__b")
replace_from(x4, "_", 1)
replace_to(x4, "_", 1)
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.