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Items to features | BigML.com
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whizzml
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Items to features
Details:
Created
Thu, 8 Oct 2026 15:01:02 +0000
Published
Thu, 8 Oct 2026 17:26:19 +0000
Description:
Adds new features to a dataset based on the items in one of its fields
Tags:
BigMLer
BigMLer_ThuOct0826_170101
URL:
https://bigml.com/user/whizzml/gallery/script/6ac7b02ed323e2051d10e3ad
Script
FREE
Source code
;; Given a dataset and an items field, add one new feature per item ;; denoting whether the item is present or not. ;; Find field by either name or id (define (find-field* fields field) ;; When find-field enters the stdlib, this can be replaced by: ; (or (find-field fields field) ; (raise (str "Field not found: " field))) (or (fields field false) (loop (ids (keys fields)) (cond (empty? ids) (raise (str "Field not found: " field)) (= field (fields [(head ids) "name"] "")) (fields (head ids)) (recur (tail ids)))))) ;; Retrieves the list of items in the given field (define (get-items dataset-id field) (let (dataset (fetch (wait dataset-id)) field (find-field* (dataset "fields") field) items (map head (field ["summary" "items"] []))) (when (not (= "items" (field "optype" false))) (raise (str "Field '" field "' must have type 'items'"))) (when (empty? items) (raise (str "The field '" field "' contains no items"))) items)) ;; Creates the flatline generator for the list of items (define (item-flatline field item yes no) (flatline "(if (contains-items? {{field}} {{item}}) {{yes}} {{no}})")) ;; Main workflow function (define (generate-dataset dataset-id field yes no) (let (items (get-items dataset-id field) item-reqs (for (i items) {"field" (item-flatline field i yes no) "name" i})) (create-dataset {"origin_dataset" dataset-id "new_fields" item-reqs}))) (define output-dataset (wait (generate-dataset input-dataset items-field true-value false-value)))
Description
Adds new features to a dataset based on the items in one of its fields
Adds new features to a dataset based on the items in one of its fields
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License:
Creative Commons Zero V1.0
Script
FREE
Items to features | BigML.com
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