Complete J novices knowing some APL might find this useful (for the first week or so): http://www.jsoftware.com/jwiki/APL2JPhraseBook where '\' is referred-to as {backslash}.
The following is a deeper introduction to J for APLers. Authoritative, it is more tutorial than reference: http://www.jsoftware.com/jwiki/Doc/J4APL ...needs to be read through at least once. A far less formal intro to J for (sceptical) APLers is: http://www.jsoftware.com/jwiki/IanClark/JinaDay This emphasises j602 JWD and is less good for j701. No good as a language reference as such. The References section is probably the most use. On Mon, Aug 15, 2011 at 1:08 PM, Gian Medri <[email protected]> wrote: > Hi! > > To expand a vector APL has a primitive "\" to do expansion. > b=: 1 0 0 1 0 1 > b\1 2 3 > 1 0 0 2 0 3 > b\'abc' > a b c > I didn't find any primitive in J to do this. How can J solve this problem? > > Thanks in advance > > Gian Medri > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
