What is the best way of using a character vector, such as:
vector <- c("36","944","38","994")
To generate a string like this:
new_string <- "x == '36'| x == '944'| x == '38'| x == '994'"
I tried using paste0 but I am searching for a more efficient way to do this, i.e.
paste0("x == ", '36', "| x == ", "944, "| x == ")
We may use %in% here instead of == (assuming that the end goal is to subset a vector x based on the values in vector
x %in% vector
If we want to use ==, this can be done with Reduce
Reduce(`|`, lapply(vector, function(u) x == u))
If the intention is to create a string, use collapse in paste
paste0('x==', "'", vector, "'", collapse = "|")
[1] "x=='36'|x=='944'|x=='38'|x=='994'"
" instead of 'paste0('x==', "'", vector, "'", collapse = "|")# [1] "x=='36'|x=='944'|x=='38'|x=='994'"paste0 is actually efficient, as R is a vectorized language. Try this:
vector <- c("36","944","38","994")
paste0("x == '", vector, "'",collapse = "|")
Hope it is helpful.
