([:<:}.%}:)i.10 _ 1 0.5 0.333333 0.25 0.2 0.166667 0.142857 0.125 But you probably do not want the shorter solution, but the more transparent one.
Den 12:31 mandag den 17. februar 2014 skrev Joe Bogner <joebog...@gmail.com>: >From the J in 5 minutes thread, I'm starting to build my example > >In my example, I'm working with stock prices. One of the the outputs is a >daily % change over the previous day > >I want the code to be clean. Is there a cleaner way to express this, or >would this be considered fine? > >I want to calculate % change of y over x > >Nums=.i.10 >pctChange=:3 : '((}. y) % (}: y)) -1' > >pctChange Nums >_ 1 0.5 0.333333 0.25 0.2 0.166667 0.142857 0.125 > >pctChange 4 5 3 >0.25 _0.4 > > >It seemed like I should have been able to do something with Insert, but I >can't figure it out. >---------------------------------------------------------------------- >For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
