Harvey sounds like you are looking for each, eg
%: each 4;9;16 +-+-+-+ |2|3|4| +-+-+-+ ~greg heil https//picsrp.github.io -- from: HH PackRat <hhpack...@gmail.com> to: programm...@jsoftware.com date: May 14, 2021, 8:13 PM subject: [Jprogramming] Mass amend Hello again! >I'm thinking, for example, of a table of boxed data in its transposed >horizontal position that has, say, 3 rows of, say, 1000 *boxed* values each. >My goal is to amend *all* of the boxed values to their square roots in one >version of what I want to do and *all* of the original boxed values to their >logarithmic equivalents (maybe multiplied by a constant, say, 100) in a second >version . >Using what I know from past answers to my questions, I'm sure I could use >"for" loops with repeated amends to accomplish this, but that seems to be >working against J's efficiency in dealing with large quantities of data at >once. >How can I do such a mass "amend" of entire tables in one fell swoop in J? >Please show EXPLICIT code rather than tacit code. Thanks for any and all help! Harvey ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
