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Example
- One
> v = "My Name";
> class(v)
[1] "character"
- List
> v <- c("My Name","Is","Nico")
> class(v)
[1] "character"
Management
Counting the number of occurrence
library(stringr)
str_count("/mt/path", "/")
[1] 2
Concatenate
Concatenate vectors after converting to character.
helloWorld <- paste0("Hello", "world", sep=" ")
where:
- sep is the separator character between the arguments
Escape \ Quotes
https://stat.ethz.ch/R-manual/R-devel/library/base/html/Quotes.html
Substring
substr(x, start, stop)
substring(text, first, last = 1000000L)
substr(x, start, stop) <- value
substring(text, first, last = 1000000L) <- value
Contain
- grepl returns a logical vector (match or not for each element of the input x).
test = "[nqSError: 46066]"
grepl("46066",test)
[1] TRUE
- grep will filter the vector.