Brilliant, that's exactly what I was looking for! I forgot to try that.
Thanks, Jon -------------------------------------------- On Wed, 1/24/18, Rob Hodgkinson <[email protected]> wrote: Subject: Re: [Jprogramming] Reshaping 3+d matrices To: [email protected] Date: Wednesday, January 24, 2018, 4:32 PM Hi John, did you try dyadic transpose (x |: y) where x is a reposition vector of dimensions … (1 0 2 |: mat) -: |:"2|:"3|:"2 mat 1 …/Rob > On 24 Jan 2018, at 6:21 pm, 'Jon Hough' via Programming <[email protected]> wrote: > > I have a 3d matrix of shape a b c say. But I want to reshape it to have shape b a c, while still keeping data positional integrity. > So doing (b,a,c) $, myMatrix > will not work, as it destroys the relative positional relations between items. > e.g. > > mat =: ? 3 10 20 $ 0 NB. shape 3x10x20 > > I can reshape it using > |:"2|:"3|:"2 mat > > But this seems ugly, and based on past experience there is usually an obvious / simple / elegant / in-built way to > do it. It seems like there is a nicer way to do it. > > Any ideas? > > Thanks, > Jon > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
