I wrote up this essay awhile back: http://www.jsoftware.com/jwiki/JoeBogner/Joins
I and others also use R so feel free to post the R example you are looking to compare to J On Dec 7, 2014 9:57 PM, "Ryan" <[email protected]> wrote: > 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 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
