Mercurial > octave
changeset 26667:3c4ba50b2024
comet.m: Use constant speed regardless of size of data input.
* comet.m: Change default time to display each data point to "5 / numel (z)"
so that it scales with input. Update documentation to reflect this.
Use more accurate timing mechanism borrowed from movie.m.
| author | Rik <rik@octave.org> |
|---|---|
| date | Sat, 02 Feb 2019 18:14:43 -0800 |
| parents | 5c46c13b43ad |
| children | fec69a310833 |
| files | scripts/plot/draw/comet.m |
| diffstat | 1 files changed, 11 insertions(+), 6 deletions(-) [+] |
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--- a/scripts/plot/draw/comet.m Sat Feb 02 18:07:47 2019 -0800 +++ b/scripts/plot/draw/comet.m Sat Feb 02 18:14:43 2019 -0800 @@ -28,7 +28,7 @@ ## ## The speed of the comet may be controlled by @var{p}, which represents the ## time each point is displayed before moving to the next one. The default for -## @var{p} is 0.1 seconds. +## @var{p} is @code{5 / numel (@var{y})}. ## ## If the first argument @var{hax} is an axes handle, then plot into this axes, ## rather than the current axes returned by @code{gca}. @@ -47,11 +47,11 @@ elseif (nargin == 1) y = varargin{1}; x = 1:numel (y); - p = 0.1; + p = 5 / numel (y); elseif (nargin == 2) x = varargin{1}; y = varargin{2}; - p = 0.1; + p = 5 / numel (y); elseif (nargin == 3) x = varargin{1}; y = varargin{2}; @@ -73,6 +73,10 @@ x(1), y(1), "color", "b", "marker", "o"); axis (limits); # set manual limits to speed up plotting + ## Initialize the timer + t = p; + timerid = tic (); + for n = 2:(num+dn) m = n - dn; m = max ([m, 1]); @@ -80,8 +84,9 @@ set (hl(1), "xdata", x(1:m), "ydata", y(1:m)); set (hl(2), "xdata", x(m:k), "ydata", y(m:k)); set (hl(3), "xdata", x(k), "ydata", y(k)); - drawnow (); - pause (p); + + pause (t - toc (timerid)); + t += p; endfor unwind_protect_cleanup @@ -100,5 +105,5 @@ %! t = 0:.1:2*pi; %! x = cos (2*t) .* (cos (t).^2); %! y = sin (2*t) .* (sin (t).^2); -%! comet (x, y, 0.05); +%! comet (x, y, .05); %! hold off;