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[Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only
From: |
Nicholas Jankowski |
Subject: |
[Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot |
Date: |
Thu, 20 Apr 2023 11:41:26 -0400 (EDT) |
Follow-up Comment #25, bug #39552 (project octave):
i saw the same, but this seems to work:
%!test <*39552> # Check arrow length and scale factor adjustment.
%! hf = figure ("visible", "off");
%! hax = gca ();
%! unwind_protect
%! [x,y] = meshgrid (1:2);
%! u = [0 1; 2 3];
%! v = [1 2; 3 4];
%! numpts = numel (x);
%! sf = 0.5;
%!
%! ## Check single arrow.
%! h = quiver (hax, x(4), y(4), u(4), v(4), 1);
%! child = find (cellfun ( ...
%! @numel, {get(get (h, "children")).xdata}) == 3);
%! xendpoint = get (get (h, "children")(child), "xdata")(2);
%! assert (xendpoint, x(4) + u(4), eps);
%! h = quiver (hax, x(4), y(4), u(4), v(4), sf);
%! child = find (cellfun( ...
%! @numel, {get(get (h, "children")).xdata}) == 3);
%! xendpoint = get (get (h, "children")(child), "xdata")(2);
%! assert (xendpoint, x(4) + sf*u(4), eps);
%!
%! ## Check multiple arrows.
%! numpts = 4;
%! h = quiver (hax, x, y, u, v, 1);
%! child = find (cellfun ( ...
%! @numel, {get(get (h, "children")).xdata}) == 3*numpts);
%! xendpoint1 = get (get (h, "children")(child), "xdata")(5);
%! assert (xendpoint1, x(2) + (sqrt(2)/10)*u(2), eps);
%! xendpoint2 = get (get (h, "children")(child), "xdata")(11);
%! assert (xendpoint2, x(4) + (sqrt(2)/10)*u(4), eps);
%! h = quiver (hax, x, y, u, v, sf);
%! child = find (cellfun ( ...
%! @numel, {get(get (h, "children")).xdata}) == 3*numpts);
%! xendpoint1 = get (get (h, "children")(child), "xdata")(5);
%! assert (xendpoint1, x(2) + sf*(sqrt(2)/10)*u(2), eps);
%! xendpoint2 = get (get (h, "children")(child), "xdata")(11);
%! assert (xendpoint2, x(4) + sf*(sqrt(2)/10)*u(4), eps);
%!
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
If you think that's too needlessly complicated, I could push the comment #14
version, along with a comment in `__quiver__` that changing the ordering will
break BISTS in quiver.m and would need to be updated. But since the test
above works, and shouldn't be fragile to other changes, I think it should be
okay to use.
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- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, (continued)
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Dmitri A. Sergatskov, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Dmitri A. Sergatskov, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Dmitri A. Sergatskov, 2023/04/19
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Markus Mützel, 2023/04/20
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/20
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Markus Mützel, 2023/04/20
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot,
Nicholas Jankowski <=
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/20
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Markus Mützel, 2023/04/20
- [Octave-bug-tracker] [bug #39552] quiver/quiver3 ignores scale with only one point to plot, Nicholas Jankowski, 2023/04/20