I believe you can easily plot points in 3D space with lines betweens pairs of points:
require 'plot' plot (; 2&o. ; 1&o.) i:10j100 Cheers, Louis > On 28 Oct 2017, at 15:12, 'Skip Cave' via Programming > <programm...@jsoftware.com> wrote: > > Thanks to Raul & Esa for their very clear instructions and examples for > plotting points in 2D space. > > I originally thought that my plot post was overlooked, so I re-posted it > under a more descriptive > title. Then I saw Raul & Esa's posts, so you can ignore that post. > In any case, Raul & Esa's answers have resolved part of my requirements. > > However, I need to plot 3D point plots as well. So I may need to look at GNU > Plot, or > perhaps Mathematica, to do the 3D plots. I also need to draw lines between > the pairs of points > (between each left argument point and it's corresponding right argument > point) in both 2D & 3D plots. > > I might be willing to pay for someone to update the J plot package to > handle point plots and lines > between point pairs. Anyone interested? > > Skip > > <<< >>> > >> On Sat, Oct 28, 2017 at 1:53 AM, Raul Miller <rauldmil...@gmail.com> wrote: >> >> I had to study the plot docs, and experiment a little. The page >> http://code.jsoftware.com/wiki/Plot/Data is probably the most >> important to understand. >> >> For your item 1, something like this might work (change the pensize to >> change the size of the dots - the default size is too small for a >> graph with only a few dots): >> >> 'type dot;pensize 5' plot ;/|:0 0, 2 _3, _1 2, 1 1,_1 _2,: 3 4 >> >> Note, especially, that I used ,: between the last pair of points so >> these would form into a matrix rather than a long vector. (And then I >> flipped the matrix on its side with |: and broke it into x and y >> elements using ;/ so that plot would recognize the data in the way you >> wanted it to.) >> >> For your item 2, I just now saw Lippu Esa post what looks like a good >> answer while I was composing this message. >> >> For your item 4 .. according to >> http://code.jsoftware.com/wiki/Plot/Types plot currently does not >> support dot plots for 3d data. I sometimes struggle understanding >> plot's limitations, but since I have not been prepared to rewrite it, >> I mostly just accept them as they are. Still, we could use a stick >> plot: >> >> 'type stick; pensize 5' plot ;/|:_1 _1 _1,0 0 0, 2 _3 1, _1 2 0, 1 >> 1 1,_1 _2 3,: 3 4 2 >> >> Sadly, it looks like a stick plot does not adequately show some >> points. We could work around that by adding another point to force a >> different bounding box: >> >> 'type stick; pensize 5' plot ;/|:_1 _1 _1,0 0 0, 2 _3 1, _1 2 0, 1 1 >> 1,_1 _2 3,: 3 4 2 >> >> There might be a better way? >> >> For your item 5, you can also set the observer viewpoint: >> >> 'type stick; pensize 5; viewpoint _1.6 _2.4 1.5' plot ;/|:0 0 0, 2 >> _3 1, _1 2 0, 1 1 1,_1 _2 3,: 3 4 2 >> >> And, finally, for your item 6, you would probably want to break up >> this one-liner into a sequence of commands, as was illustrated in >> Lippu Esa's post. (You do get a sequence of commands separated by ; in >> the left hand argument to plot, but to break up the data and issue >> commands for different chunks of data you need to work with a sequence >> of pd statements.) >> >> Thanks, >> >> -- >> Raul >> >> >> >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
