# Functions ### abs Returns the absolute value of the input. **Syntax** ``` abs(expr) ``` ### add Adds the two inputs. **Syntax** ``` add(expr1, expr2) ``` ### and Logical and operation of two or more boolean columns. **Syntax** ``` and(expr1, expr2) ``` ### automated\_readability\_index Returns the ARI (Automated Readability Index) which outputs a number that approximates the grade level needed to comprehend the text. For example if the ARI is 6.5, then the grade level to comprehend the text is 6th to 7th grade. **Syntax** ``` automated_readability_index(expr) ``` ### bleu Computes the BLEU score between two columns. **Syntax** ``` bleu(expr1, expr2) ``` ### character\_count Returns the number of characters in a text column. **Syntax** ``` character_count(expr) ``` **Aliases** * `num_chars` ### divide Divides the two inputs. **Syntax** ``` divide(expr1, expr2) ``` ### equal\_to Computes the element-wise equal to comparison of two columns. **Syntax** ``` equal_to(expr1, expr2) ``` **Aliases** * `eq` ### filter Filters a column using another column as a mask. **Syntax** ``` filter(expr1, expr2) ``` ### flesch\_kincaid\_grade Returns the Flesch-Kincaid Grade of the given text. This is a grade formula in that a score of 9.3 means that a ninth grader would be able to read the document. **Syntax** ``` flesch_kincaid_grade(expr) ``` ### greater\_than Computes the element-wise greater than comparison of two columns. input1 > input2 **Syntax** ``` greater_than(expr1, expr2) ``` **Aliases** * `gt` ### greater\_than\_or\_equal\_to Computes the element-wise greater than or equal to comparison of two columns. input1 >= input2 **Syntax** ``` greater_than_or_equal_to(expr1, expr2) ``` **Aliases** * `gte` ### is\_valid\_json Returns true if the input string is valid json. **Syntax** ``` is_valid_json(expr) ``` ### less\_than Computes the element-wise less than comparison of two columns. input1 < input2 **Syntax** ``` less_than(expr1, expr2) ``` **Aliases** * `lt` ### less\_than\_or\_equal\_to Computes the element-wise less than or equal to comparison of two columns. input1 <= input2 **Syntax** ``` less_than_or_equal_to(expr1, expr2) ``` **Aliases** * `lte` ### levenshtein Returns Damerau-Levenshtein distance between two strings. **Syntax** ``` levenshtein(expr1, expr2) ``` ### list\_has\_duplicate Returns True if the list has duplicated items. **Syntax** ``` list_has_duplicate(expr) ``` ### list\_len Returns the length of lists in a list column. **Syntax** ``` list_len(expr) ``` ### list\_most\_common Most common item in list. **Syntax** ``` list_most_common(expr) ``` ### multiply Multiplies the two inputs. **Syntax** ``` multiply(expr1, expr2) ``` ### negate Returns the negation of the input. **Syntax** ``` negate(expr) ``` ### not Logical not operation of a boolean column. **Syntax** ``` not(expr) ``` ### not\_equal\_to Computes the element-wise not equal to comparison of two columns. **Syntax** ``` not_equal_to(expr1, expr2) ``` **Aliases** * `neq` ### or Logical or operation of two or more boolean columns. **Syntax** ``` or(expr1, expr2) ``` ### rouge1 Returns the rouge1 score between two columns. **Syntax** ``` rouge1(expr1, expr2) ``` ### rouge2 Returns the rouge2 score between two columns. **Syntax** ``` rouge2(expr1, expr2) ``` ### rougeL Returns the rougeL score between two columns. **Syntax** ``` rougeL(expr1, expr2) ``` ### rougeLsum Returns the rougeLsum score between two columns. **Syntax** ``` rougeLsum(expr1, expr2) ``` ### sentence\_count Returns the number of sentences in a text column. **Syntax** ``` sentence_count(expr) ``` **Aliases** * `num_sentences` ### subtract Subtracts the two inputs. **Syntax** ``` subtract(expr1, expr2) ``` ### token\_count Returns the number of tokens in a text column. **Syntax** ``` token_count(expr) ``` ### word\_count Returns the number of words in a text column. **Syntax** ``` word_count(expr) ``` **Aliases** * `num_words`