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stri_list2matrix {stringi}R Documentation

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

single logical value; should the resulting matrix be transposed?

fill

single string, see Details

n_min

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

Value

Always returns a character matrix.

Examples

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)


[Package stringi version 1.1.7 Index]