Mercurial > octave-nkf
annotate scripts/plot/quiver.m @ 14868:5d3a684236b0
maint: Use Octave coding conventions for cuddling parentheses in scripts directory
* lin2mu.m, loadaudio.m, wavread.m, accumarray.m, bicubic.m, celldisp.m,
colon.m, cplxpair.m, dblquad.m, divergence.m, genvarname.m, gradient.m,
int2str.m, interp1.m, interp1q.m, interp2.m, interpn.m, loadobj.m, nthargout.m,
__isequal__.m, __splinen__.m, quadgk.m, quadl.m, quadv.m, rat.m, rot90.m,
rotdim.m, saveobj.m, subsindex.m, triplequad.m, delaunay3.m, griddata.m,
inpolygon.m, tsearchn.m, voronoi.m, get_first_help_sentence.m, which.m,
gray2ind.m, pink.m, dlmwrite.m, strread.m, textread.m, textscan.m, housh.m,
ishermitian.m, issymmetric.m, krylov.m, logm.m, null.m, rref.m,
compare_versions.m, copyfile.m, dump_prefs.m, edit.m, fileparts.m,
getappdata.m, isappdata.m, movefile.m, orderfields.m, parseparams.m,
__xzip__.m, rmappdata.m, setappdata.m, swapbytes.m, unpack.m, ver.m, fminbnd.m,
fminunc.m, fsolve.m, glpk.m, lsqnonneg.m, qp.m, sqp.m, configure_make.m,
copy_files.m, describe.m, get_description.m, get_forge_pkg.m, install.m,
installed_packages.m, is_architecture_dependent.m, load_package_dirs.m,
print_package_description.m, rebuild.m, repackage.m, save_order.m, shell.m,
allchild.m, ancestor.m, area.m, axes.m, axis.m, clabel.m, close.m, colorbar.m,
comet.m, comet3.m, contour.m, cylinder.m, ezmesh.m, ezsurf.m, findobj.m,
fplot.m, hist.m, isocolors.m, isonormals.m, isosurface.m, isprop.m, legend.m,
mesh.m, meshz.m, pareto.m, pcolor.m, peaks.m, plot3.m, plotmatrix.m, plotyy.m,
polar.m, print.m, __add_datasource__.m, __add_default_menu__.m,
__axes_limits__.m, __bar__.m, __clabel__.m, __contour__.m, __errcomm__.m,
__errplot__.m, __ezplot__.m, __file_filter__.m, __fltk_print__.m,
__ghostscript__.m, __gnuplot_print__.m, __go_draw_axes__.m,
__go_draw_figure__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m,
__pie__.m, __plt__.m, __print_parse_opts__.m, __quiver__.m, __scatter__.m,
__stem__.m, __tight_eps_bbox__.m, __uigetdir_fltk__.m, __uigetfile_fltk__.m,
__uiputfile_fltk__.m, quiver.m, quiver3.m, rectangle.m, refreshdata.m,
ribbon.m, scatter.m, semilogy.m, shading.m, slice.m, subplot.m, surface.m,
surfl.m, surfnorm.m, text.m, uigetfile.m, uiputfile.m, whitebg.m, deconv.m,
mkpp.m, pchip.m, polyaffine.m, polyder.m, polygcd.m, polyout.m, polyval.m,
ppint.m, ppjumps.m, ppval.m, residue.m, roots.m, spline.m, splinefit.m,
addpref.m, getpref.m, setpref.m, ismember.m, setxor.m, arch_fit.m, arch_rnd.m,
arch_test.m, autoreg_matrix.m, diffpara.m, fftconv.m, filter2.m, hanning.m,
hurst.m, periodogram.m, triangle_sw.m, sinc.m, spectral_xdf.m, spencer.m,
stft.m, synthesis.m, unwrap.m, yulewalker.m, bicgstab.m, gmres.m, pcg.m, pcr.m,
__sprand_impl__.m, speye.m, spfun.m, sprandn.m, spstats.m, svds.m,
treelayout.m, treeplot.m, bessel.m, factor.m, legendre.m, perms.m, primes.m,
magic.m, toeplitz.m, corr.m, cov.m, mean.m, median.m, mode.m, qqplot.m,
quantile.m, ranks.m, zscore.m, logistic_regression_likelihood.m,
bartlett_test.m, chisquare_test_homogeneity.m, chisquare_test_independence.m,
kolmogorov_smirnov_test.m, run_test.m, u_test.m, wilcoxon_test.m, z_test.m,
z_test_2.m, bin2dec.m, dec2base.m, mat2str.m, strcat.m, strchr.m, strjust.m,
strtok.m, substr.m, untabify.m, assert.m, demo.m, example.m, fail.m, speed.m,
test.m, now.m: Use Octave coding conventions for cuddling parentheses in
scripts directory.
author | Rik <octave@nomad.inbox5.com> |
---|---|
date | Tue, 17 Jul 2012 07:08:39 -0700 |
parents | 7277fe922e99 |
children | 64e7bb01fce2 |
rev | line source |
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1 ## Copyright (C) 2007-2012 David Bateman |
7120 | 2 ## |
3 ## This file is part of Octave. | |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6 ## under the terms of the GNU General Public License as published by | |
7 ## the Free Software Foundation; either version 3 of the License, or (at | |
8 ## your option) any later version. | |
9 ## | |
10 ## Octave is distributed in the hope that it will be useful, but | |
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 ## General Public License for more details. | |
14 ## | |
15 ## You should have received a copy of the GNU General Public License | |
16 ## along with Octave; see the file COPYING. If not, see | |
17 ## <http://www.gnu.org/licenses/>. | |
18 | |
19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {} quiver (@var{u}, @var{v}) |
7120 | 21 ## @deftypefnx {Function File} {} quiver (@var{x}, @var{y}, @var{u}, @var{v}) |
22 ## @deftypefnx {Function File} {} quiver (@dots{}, @var{s}) | |
23 ## @deftypefnx {Function File} {} quiver (@dots{}, @var{style}) | |
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24 ## @deftypefnx {Function File} {} quiver (@dots{}, "filled") |
7120 | 25 ## @deftypefnx {Function File} {} quiver (@var{h}, @dots{}) |
26 ## @deftypefnx {Function File} {@var{h} =} quiver (@dots{}) | |
27 ## | |
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28 ## Plot the @code{(@var{u}, @var{v})} components of a vector field in |
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29 ## an @code{(@var{x}, @var{y})} meshgrid. If the grid is uniform, you can |
7120 | 30 ## specify @var{x} and @var{y} as vectors. |
31 ## | |
32 ## If @var{x} and @var{y} are undefined they are assumed to be | |
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33 ## @code{(1:@var{m}, 1:@var{n})} where @code{[@var{m}, @var{n}] = |
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34 ## size (@var{u})}. |
7120 | 35 ## |
36 ## The variable @var{s} is a scalar defining a scaling factor to use for | |
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37 ## the arrows of the field relative to the mesh spacing. A value of 0 |
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38 ## disables all scaling. The default value is 1. |
7120 | 39 ## |
40 ## The style to use for the plot can be defined with a line style @var{style} | |
41 ## in a similar manner to the line styles used with the @code{plot} command. | |
42 ## If a marker is specified then markers at the grid points of the vectors are | |
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43 ## printed rather than arrows. If the argument "filled" is given then the |
7120 | 44 ## markers as filled. |
45 ## | |
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46 ## The optional return value @var{h} is a graphics handle to a quiver object. |
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47 ## A quiver object regroups the components of the quiver plot (body, arrow, |
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48 ## and marker), and allows them to be changed together. |
7120 | 49 ## |
7121 | 50 ## @example |
7120 | 51 ## @group |
7121 | 52 ## [x, y] = meshgrid (1:2:20); |
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53 ## h = quiver (x, y, sin (2*pi*x/10), sin (2*pi*y/10)); |
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54 ## set (h, "maxheadsize", 0.33); |
7121 | 55 ## @end group |
7120 | 56 ## @end example |
57 ## | |
58 ## @seealso{plot} | |
59 ## @end deftypefn | |
60 | |
61 function retval = quiver (varargin) | |
7121 | 62 |
7215 | 63 [h, varargin, nargin] = __plt_get_axis_arg__ ("quiver", varargin{:}); |
64 | |
7120 | 65 if (nargin < 2) |
66 print_usage (); | |
7215 | 67 else |
7120 | 68 oldh = gca (); |
69 unwind_protect | |
70 axes (h); | |
71 newplot (); | |
7215 | 72 tmp = __quiver__ (h, 0, varargin{:}); |
7120 | 73 unwind_protect_cleanup |
74 axes (oldh); | |
75 end_unwind_protect | |
76 endif | |
77 | |
78 if (nargout > 0) | |
79 retval = tmp; | |
80 endif | |
7121 | 81 |
7120 | 82 endfunction |
83 | |
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84 |
7120 | 85 %!demo |
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86 %! clf; |
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87 %! [x,y] = meshgrid (1:2:20); |
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88 %! h = quiver (x,y, sin (2*pi*x/10), sin (2*pi*y/10)); |
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89 %! set (h, 'maxheadsize', 0.33); |
7120 | 90 |
91 %!demo | |
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92 %! clf; |
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93 %! axis ('equal'); |
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94 %! x = linspace (0, 3, 80); |
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95 %! y = sin (2*pi*x); |
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96 %! theta = 2*pi*x + pi/2; |
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97 %! quiver (x, y, sin (theta)/10, cos (theta)/10); |
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98 %! hold on; plot (x,y,'r'); hold off; |
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99 |