part Extraction of characters from strings [strings_out] = part(strings_in, v) strings_in a character string or matrix of character string. v a vector of integer values containing the indices of characters to be extracted. $ is accepted and means length(strings_in). strings_out a character string or matrix of character string. This function extracts characters from strings. The characters to be extracted are referred to by their indices contained in v. strings_out is filled with whitespace characters when indices are beyond the input string's length. v may contain $ symbol which stands for the length of string_in. ['a' 'a' 'a'] part(['a', 'abc', 'abcd'], [1, 1]) // => ['aa' 'aa' 'aa'] part(['a', 'abc', 'abcd'], [1, 1, 2]) // => ['aa' 'aab' 'aab'] // Repeating a character N times: N = 10; part('-', ones(1:N)) // => '----------' // Repeating a pattern N times: N = 6; pat = '- '; part(pat, ones(1:N).*.(1:length(pat))) // => '- - - - - - ' // Using $ = implicit length of strings: // 1) part(['a string' 'another longer one'], $-2:$ ) // => [ 'ing' 'one'] // 2) Another implementation for strrev(): part('Hello world', $:-1:1) // => 'dlrow olleH' // 3) With unranging $: part('Hello world', [ $ 4:5 ]) // => 'dlo' // 4) Mixing scalar or unrangin $ with ranging ones is not possible: part("Hello", [ 1 $-1:$ $ ]) // => error ]]> string strsplit length 5.5.0 $ standing for length(input_strings) is now accepted in indices of selected characters