@addquotes Enclose string in quotation marks.

@asc ASCII value of character.

@chr ASCII value to string character.

@iif Recode values by condition (conditional value).

@inlist Dummy variable for value in list.

@insert Insert string into string.

@instr Find position of substring in a string.

@left Left-hand characters in a string.

@len Length of a string.

@length Length of a string.

@lower Lowercase representation of a string, or lower triangular matrix of a matrix.

@ltrim Trim left-whitespace from string.

@mid Substring in middle or from middle to end of string.

@nan Recode missing values.

@recode Recode value by condition.

@replace Replace substring in string.

@right Right substring of string.

@rinstr Find substring position in string.

@rtrim Trim right whitespace of string.

@str String representation of number.

@strdate String corresponding to the date of the observation.

@stripcommas Remove leading and trailing commas surrounding string.

@stripparens Remove paired leading and trailing parentheses surrounding string.

@stripquotes Remove paired double-quotation marks surrounding string.

@strlen Length of string.

@trim Trim left and right whitespace from string.

@upper Uppercase representation of a string; or upper triangular matrix of a matrix.

@val Number from a string.

@wcount Number of words in the string list.

@wcross String with words in first list crossed with second.

@wdelim Replace delimiters in string.

@wdrop Drop words from string list.

@wexpand String representation of automatic dummy variables.

@wfind Find location of word (case-sensitive) in string list.

@wfname String containing name of current workfile.

@wfindnc Find location of word (not case-sensitive) in string list.

@winterleave Interleave words of two string lists.

@wintersect Intersection of words in two string lists.

@wjoin Extract elements of an Svector to a string.

@wkeep Keep subset of words in string list.

@wleft Left-most words of string list.

@wmid Middle or middle to end words of a string list.

@wnotin Words not in a string list.

@word Single word from a string list.

@wordq Single word from a string list, preserving quotes.

@wread Read contents of text file into a string.

@wreplace Replace characters in each word in a string list.

@wrfind Find location of a word (case-sensitive) in a string list searching from end.

@wrfindnc Find location of a word (not case-sensitive) in a string list searching from end.

@wright Right-most words of a string list.

@wsort Sorted list of words in a string list.

@wsplit Create string vector from words in a string list.

@wunion Union of words in two string lists.

@wunique Remove duplicate words in string list.