Cells and items are defined in Section II a of the dictionary. http://www.jsoftware.com/help/dictionary/dicta.htm
If k is positive and no more than the rank r of an array y (r=. #$y), then the k-cells of y are the subarrays on the trailing k axes of y ; if k is negative (and no less than -r), then the k-cells are the (r+k)-cells. Items are_1-cells. <"k y is a good way to look at the k-cells. In the dictionary entry for -. says: x-.y includes all items of x except those that are cells of y . Note that the items of x may not be items of y . x=: 7 2 [EMAIL PROTECTED] 5 y=: 5 6 2 [EMAIL PROTECTED] 4 x -. y 4 2 4 4 0 4 ----- Original Message ----- From: June Kim <[EMAIL PROTECTED]> Date: Friday, September 22, 2006 9:43 am Subject: Cell (was Re: [Jgeneral] I expect a table of ordered pairs for this) > 2006/9/23, Henry Rich <[EMAIL PROTECTED]>: > > u/ applies u between each cell of x and the entire y. > > > > Cell. Not atom. Not item. > > > [snip] > > What is the definition of "cell"? > > Moreover, a page on -. (Less) from the J dictionary reads: > > x-.y includes all ITEMS of x except for those that are CELLS of > y . > (emphasis is mine) > > Is the choice of two different words intentional here? What if "cells" > were replaced with "items" in the sentence? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
