I appreciate how helpful this forum has been so far so I'd thought I'd ask another question.
Essentially, can someone point me to how J users perform the basic data manipulation operations that you can do, for example, using R's dplyr or SQL queries? Specifically, I want to be able to (mainly on a bunch of csv files): Do unions, joins, selects, filters, group by's, and create new columns as functions of other columns. I want to get a sense of how easy it is compared to R, and hopefully learn efficient ways of doing it in J. thanks for any help, Ryan The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
