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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} __plr__ (@var{theta}, @var{rho}, @var{fmt}) |
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22 ## @end deftypefn |
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23 |
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24 ## Author: jwe |
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25 |
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26 function __plr__ (theta, rho, fmt) |
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27 |
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28 if (nargin == 1) |
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29 [nr, nc] = size (theta); |
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30 if (nr == 1) |
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31 theta = theta.'; |
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32 tmp = nr; |
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33 nr = nc; |
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34 nc = tmp; |
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35 endif |
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36 theta_i = imag (theta); |
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37 if (any (theta_i)) |
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38 rho = theta_i; |
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39 theta = real (theta); |
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40 else |
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41 rho = theta; |
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42 theta = (1:nr)'; |
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43 endif |
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44 endif |
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45 |
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46 ## Note that we call __plt__ instead of __pltXX__ below, even though |
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47 ## we know the argument types. This is so we don't have to duplicate |
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48 ## the functionality of __plt__ here (the __pltXX__ functions only |
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49 ## return data and fmtstr now). |
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50 |
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51 if (nargin <= 2) |
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52 if (any (imag (theta))) |
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53 theta = real (theta); |
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54 endif |
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55 if (any (imag (rho))) |
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56 rho = real (rho); |
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57 endif |
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58 if (isscalar (theta)) |
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59 if (isscalar (rho)) |
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60 x = rho * cos (theta); |
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61 y = rho * sin (theta); |
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62 __plt__ ("polar", x, y, fmt); |
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63 endif |
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64 elseif (isvector (theta)) |
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65 if (isvector (rho)) |
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66 if (length (theta) != length (rho)) |
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67 error ("polar: vector lengths must match"); |
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68 endif |
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69 if (rows (rho) == 1) |
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70 rho = rho.'; |
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71 endif |
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72 if (rows (theta) == 1) |
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73 theta = theta.'; |
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74 endif |
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75 x = rho .* cos (theta); |
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76 y = rho .* sin (theta); |
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77 __plt__ ("polar", x, y, fmt); |
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78 elseif (ismatrix (rho)) |
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79 [t_nr, t_nc] = size (theta); |
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80 if (t_nr == 1) |
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81 theta = theta.'; |
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82 tmp = t_nr; |
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83 t_nr = t_nc; |
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84 t_nc = tmp; |
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85 endif |
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86 [r_nr, r_nc] = size (rho); |
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87 if (t_nr != r_nr) |
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88 rho = rho.'; |
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89 tmp = r_nr; |
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90 r_nr = r_nc; |
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91 r_nc = tmp; |
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92 endif |
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93 if (t_nr != r_nr) |
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94 error ("polar: vector and matrix sizes must match"); |
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95 endif |
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96 x = diag (cos (theta)) * rho; |
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97 y = diag (sin (theta)) * rho; |
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98 __plt__ ("polar", x, y, fmt); |
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99 endif |
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100 elseif (ismatrix (theta)) |
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101 if (isvector (rho)) |
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102 [r_nr, r_nc] = size (rho); |
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103 if (r_nr == 1) |
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104 rho = rho.'; |
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105 tmp = r_nr; |
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106 r_nr = r_nc; |
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107 r_nc = tmp; |
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108 endif |
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109 [t_nr, t_nc] = size (theta); |
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110 if (r_nr != t_nr) |
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111 theta = rho.'; |
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112 tmp = t_nr; |
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113 t_nr = t_nc; |
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114 t_nc = tmp; |
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115 endif |
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116 if (r_nr != t_nr) |
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117 error ("polar: vector and matrix sizes must match"); |
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118 endif |
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119 diag_r = diag (r); |
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120 x = diag_r * cos (theta); |
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121 y = diag_r * sin (theta); |
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122 __plt__ ("polar", x, y, fmt); |
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123 elseif (ismatrix (rho)) |
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124 if (size (rho) != size (theta)) |
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125 error ("polar: matrix dimensions must match"); |
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126 endif |
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127 x = rho .* cos (theta); |
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128 y = rho .* sin (theta); |
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129 __plt__ ("polar", x, y, fmt); |
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130 endif |
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131 endif |
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132 else |
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133 usage ("__plr__ (x, y)"); |
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134 endif |
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135 |
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136 endfunction |
