In general, rather than trying to find literal translation, such as axis, it is better to relate the meaning, such as append vectors into a matrix.
And it's very helpful to have an example with actual data for illustration. --- Devon McCormick <[EMAIL PROTECTED]> wrote: > or even > attk-.0 > or, more fully in the context of the original question > z=. r,:0-.~+/z > > On 8/7/06, Joey K Tuttle <[EMAIL PROTECTED]> wrote:... > > To select the non-zero elements in j would be > > (0 ~: attk)#attk > > > ... > -- > Devon McCormick > ^me^ at acm. > org is my > preferred e-mail --- PackRat <[EMAIL PROTECTED]> wrote: > I'm trying to convert a series of specialized APL functions in a book I > have to equivalent J versions. I have a programming background, but > I'm a newbie at both languages (I have several APL books, but nowhere > near as much for J), so it's initially slow going. (But it sure gives > a lot of practice in learning J, though!) > > Anyway, I've encountered two things so far that have stumped me: > > (1) I can't figure out how to convert the APL lamination (the [_0.5]) > in the following line to J code: > > Z<-R,[_0.5](0#ATTK)/ATTK<-+/[0] Z > > (I used J's underscore for APL's "high minus" to indicate negative and > the # to indicate APL's not equal) > > How would it look if it were a positive [1.5] instead? > > Additionally, how is "+/[0] Z" converted? > > > (2) How does one get input from a user in J without having to use a > GUI? For example, in typical APL sequences, you might have: > > 'ENTER TOTAL TIME' > T<-[] > and > 'ENTER K VALUE' > K<-['] > > (where [] and ['] are the APL quad and quote-quad characters) > > What are the J equivalents for these two sequences? > > > I'd appreciate any help or guidance that you all can give me. Thanks! > > Harvey __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
