stringi (version 1.4.3)

stri_list2matrix: Convert a List to a Character Matrix

Description

This function converts a given list of atomic vectors to a character matrix.

Usage

stri_list2matrix(x, byrow = FALSE, fill = NA_character_, n_min = 0)

Arguments

x

a list of atomic vectors

byrow

a single logical value; should the resulting matrix be transposed?

fill

a single string, see Details

n_min

a single integer value; minimal number of rows (byrow==FALSE) or columns (otherwise) in the resulting matrix

Value

Returns a character matrix.

Details

This function is similar to the built-in simplify2array function. However, it always returns a character matrix, even if each element in x is of length 1 or if elements in x are not of the same lengths. Moreover, the elements in x are always coerced to character vectors.

If byrow is FALSE, then a matrix with length(x) columns is returned. The number of rows is the length of the longest vector in x, but no less than n_min. Basically, we have result[i,j] == x[[j]][i] if i <= length(x[[j]]) and result[i,j] == fill otherwise, see Examples.

If byrow is TRUE, then the resulting matrix is a transposition of the above-described one.

This function may be useful, e.g., in connection with stri_split and stri_extract_all.

See Also

Other utils: stri_na2empty, stri_remove_empty, stri_replace_na

Examples

# NOT RUN {
simplify2array(list(c("a", "b"), c("c", "d"), c("e", "f")))
stri_list2matrix(list(c("a", "b"), c("c", "d"), c("e", "f")))
stri_list2matrix(list(c("a", "b"), c("c", "d"), c("e", "f")), byrow=TRUE)

simplify2array(list("a", c("b", "c")))
stri_list2matrix(list("a", c("b", "c")))
stri_list2matrix(list("a", c("b", "c")), fill="")
stri_list2matrix(list("a", c("b", "c")), fill="", n_min=5)

# }