/usr/share/plplot_octave/support/__plr2__.m is in octave-plplot 5.10.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | ## Copyright (C) 1996 John W. Eaton
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
## Author: jwe
## Modified: jc
function __plr2__ (theta, rho, fmt)
if (nargin != 3)
usage ("__plr2__ (theta, rho, fmt)");
endif
if (any (imag (theta)))
theta = real (theta);
endif
if (any (imag (rho)))
rho = real (rho);
endif
if (isscalar (theta))
if (isscalar (rho))
x = rho * cos (theta);
y = rho * sin (theta);
__plt2ss__ (x, y, fmt);
endif
elseif (isvector (theta))
if (isvector (rho))
if (length (theta) != length (rho))
error ("polar: vector lengths must match");
endif
if (rows (rho) == 1)
rho = rho';
endif
if (rows (theta) == 1)
theta = theta';
endif
x = rho .* cos (theta);
y = rho .* sin (theta);
__plt2vv__ (x, y, fmt);
elseif (ismatrix (rho))
[t_nr, t_nc] = size (theta);
if (t_nr == 1)
theta = theta';
tmp = t_nr;
t_nr = t_nc;
t_nc = tmp;
endif
[r_nr, r_nc] = size (rho);
if (t_nr != r_nr)
rho = rho';
tmp = r_nr;
r_nr = r_nc;
r_nc = tmp;
endif
if (t_nr != r_nr)
error ("polar: vector and matrix sizes must match");
endif
x = diag (cos (theta)) * rho;
y = diag (sin (theta)) * rho;
__plt2vm__ (x, y, fmt);
endif
elseif (ismatrix (theta))
if (isvector (rho))
[r_nr, r_nc] = size (rho);
if (r_nr == 1)
rho = rho';
tmp = r_nr;
r_nr = r_nc;
r_nc = tmp;
endif
[t_nr, t_nc] = size (theta);
if (r_nr != t_nr)
theta = theta';
tmp = t_nr;
t_nr = t_nc;
t_nc = tmp;
endif
if (r_nr != t_nr)
error ("polar: vector and matrix sizes must match");
endif
diag_r = diag (rho); # typo: in original sources was diag(r)
x = diag_r * cos (theta);
y = diag_r * sin (theta);
__plt2mv__ (x, y, fmt);
elseif (ismatrix (rho))
if (size (rho) != size (theta))
error ("polar: matrix dimensions must match");
endif
x = rho .* cos (theta);
y = rho .* sin (theta);
__plt2mm__ (x, y, fmt);
endif
endif
endfunction
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