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Suppose I have a number: 4321
and I want to extract it into digits: 4, 3, 2, 1
How do I do this?
643
To split a number into digits in R, we can use strsplit function by reading the number with as. character and then reading the output with as. numeric.
In this method to extract numbers from character string vector, the user has to call the gsub() function which is one of the inbuilt function of R language, and pass the pattern for the first occurrence of the number in the given strings and the vector of the string as the parameter of this function and in return, this ...
Alternatively, with strsplit:
x <- as.character(4321)
as.numeric(unlist(strsplit(x, "")))
[1] 4 3 2 1
Use substring to extract character at each index and then convert it back to integer:
x <- 4321
as.integer(substring(x, seq(nchar(x)), seq(nchar(x))))
[1] 4 3 2 1
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