September 2013
Intermediate to advanced
114 pages
2h 51m
English
Content preview from Using OpenRefineBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Recipe 5 – adding derived columns
Sometimes you do want to transform the contents of a cell, but also keep the original value. While you can go back to a cell's previous state using the Undo / Redo tab if something went wrong, it could be useful to see both the original value and the transformed value at the same time. Therefore, OpenRefine enables you to add a column based on another one.
Suppose we want to have a separate field that counts the number of categories per record. Click on the Categories dropdown, click on Edit column and Add column based on this column… A dialog very similar to the cell transformation dialog pops up; however, this time it additionally asks for a column name. Enter Category Count into the New column name field. Now, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.