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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## usage: function __plr2__ (theta, rho, fmt) |
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21 |
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22 ## Author: jwe |
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23 |
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24 function __plr2__ (theta, rho, fmt) |
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25 |
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26 if (nargin != 3) |
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27 usage ("__plr2__ (theta, rho, fmt)"); |
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28 endif |
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29 |
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30 if (any (imag (theta))) |
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31 theta = real (theta); |
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32 endif |
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33 |
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34 if (any (imag (rho))) |
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35 rho = real (rho); |
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36 endif |
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37 |
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38 if (is_scalar (theta)) |
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39 if (is_scalar (rho)) |
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40 x = rho * cos (theta); |
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41 y = rho * sin (theta); |
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42 __plt2ss__ (x, y, fmt); |
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43 endif |
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44 elseif (is_vector (theta)) |
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45 if (is_vector (rho)) |
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46 if (length (theta) != length (rho)) |
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47 error ("polar: vector lengths must match"); |
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48 endif |
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49 if (rows (rho) == 1) |
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50 rho = rho'; |
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51 endif |
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52 if (rows (theta) == 1) |
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53 theta = theta'; |
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54 endif |
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55 x = rho .* cos (theta); |
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56 y = rho .* sin (theta); |
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57 __plt2vv__ (x, y, fmt); |
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58 elseif (is_matrix (rho)) |
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59 [t_nr, t_nc] = size (theta); |
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60 if (t_nr == 1) |
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61 theta = theta'; |
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62 tmp = t_nr; |
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63 t_nr = t_nc; |
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64 t_nc = tmp; |
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65 endif |
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66 [r_nr, r_nc] = size (rho); |
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67 if (t_nr != r_nr) |
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68 rho = rho'; |
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69 tmp = r_nr; |
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70 r_nr = r_nc; |
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71 r_nc = tmp; |
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72 endif |
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73 if (t_nr != r_nr) |
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74 error ("polar: vector and matrix sizes must match"); |
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75 endif |
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76 x = diag (cos (theta)) * rho; |
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77 y = diag (sin (theta)) * rho; |
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78 __plt2vm__ (x, y, fmt); |
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79 endif |
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80 elseif (is_matrix (theta)) |
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81 if (is_vector (rho)) |
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82 [r_nr, r_nc] = size (rho); |
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83 if (r_nr == 1) |
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84 rho = rho'; |
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85 tmp = r_nr; |
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86 r_nr = r_nc; |
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87 r_nc = tmp; |
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88 endif |
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89 [t_nr, t_nc] = size (theta); |
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90 if (r_nr != t_nr) |
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91 theta = theta'; |
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92 tmp = t_nr; |
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93 t_nr = t_nc; |
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94 t_nc = tmp; |
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95 endif |
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96 if (r_nr != t_nr) |
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97 error ("polar: vector and matrix sizes must match"); |
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98 endif |
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99 diag_r = diag (rho); |
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100 x = diag_r * cos (theta); |
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101 y = diag_r * sin (theta); |
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102 __plt2mv__ (x, y, fmt); |
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103 elseif (is_matrix (rho)) |
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104 if (size (rho) != size (theta)) |
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105 error ("polar: matrix dimensions must match"); |
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106 endif |
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107 x = rho .* cos (theta); |
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108 y = rho .* sin (theta); |
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109 __plt2mm__ (x, y, fmt); |
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110 endif |
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111 endif |
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112 |
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113 endfunction |
