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1 ## Copyright (C) 1996 Auburn University. All rights reserved. |
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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 the |
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7 ## Free Software Foundation; either version 2, or (at your option) any |
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8 ## later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but WITHOUT |
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11 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 ## 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} {} sysout (@var{sys}, @var{opt}) |
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22 ## print out a system data structure in desired format |
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23 ## @table @var |
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24 ## @item sys |
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25 ## system data structure |
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26 ## @item opt |
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27 ## Display option |
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28 ## @table @code |
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29 ## @item [] |
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30 ## primary system form (default) |
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31 ## @item "ss" |
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32 ## state space form |
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33 ## @item "tf" |
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34 ## transfer function form |
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35 ## @item "zp" |
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36 ## zero-pole form |
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37 ## @item "all" |
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38 ## all of the above |
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39 ## @end table |
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40 ## @end table |
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41 ## @end deftypefn |
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42 |
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43 ## Author: A. S. Hodel <a.s.hodel@eng.auburn.edu> |
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44 ## Created: 1995-1996 |
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45 |
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46 function retsys = sysout (sys, opt) |
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47 |
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48 if( (nargin < 1) || (nargin > 2) ) |
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49 print_usage (); |
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50 endif |
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51 |
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52 if(isempty(sys)) |
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53 retsys = sys; |
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54 warning("sysout: empty system") |
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55 return; |
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56 endif |
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57 |
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58 if(! isstruct(sys)) |
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59 disp("sysout: input must be a system structure") |
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60 endif |
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61 |
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62 ## set up output type array |
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63 if( nargin == 1 ) |
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64 opt = sysgettype(sys); |
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65 else |
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66 if( ! (strcmp(opt,"ss") + strcmp(opt,"tf") + ... |
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67 strcmp(opt,"zp") + strcmp(opt,"all") ) ) |
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68 error("opt must be one of [], \"ss\", \"tf\", \"zp\", or \"all\""); |
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69 endif |
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70 endif |
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71 |
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72 ## now check output for each form: |
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73 [nn,nz,mm,pp] = sysdimensions(sys); |
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74 if( mm > 0) |
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75 disp("Input(s)") |
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76 disp(__outlist__(sysgetsignals(sys,"in")," ")); |
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77 else |
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78 disp("Input(s): none"); |
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79 endif |
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80 if (pp > 0) |
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81 disp("Output(s):") |
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82 disp(__outlist__(sysgetsignals(sys,"out"), ... |
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83 " ",sysgetsignals(sys,"yd")) ); |
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84 else |
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85 disp("Output(s): none"); |
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86 endif |
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87 if(sysgettsam(sys) > 0) |
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88 disp(["Sampling interval: ",num2str(sysgettsam(sys))]); |
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89 str = "z"; |
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90 else |
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91 str = "s"; |
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92 endif |
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93 |
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94 ## transfer function form |
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95 if( strcmp(opt,"tf") + strcmp(opt,"all") ) |
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96 sys = sysupdate(sys,"tf"); #make sure tf is up to date |
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97 disp("transfer function form:") |
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98 [num,den] = sys2tf(sys); |
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99 tfout(num,den,str); |
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100 endif |
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101 |
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102 if( strcmp(opt,"zp") + strcmp(opt,"all") ) |
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103 sys = sysupdate(sys,"zp"); #make sure zp is up to date |
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104 disp("zero-pole form:") |
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105 [zer,pol,kk] = sys2zp(sys); |
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106 zpout(zer, pol, kk,str) |
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107 endif |
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108 |
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109 if( strcmp(opt,"ss") + strcmp(opt,"all") ) |
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110 sys = sysupdate(sys,"ss"); |
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111 disp("state-space form:"); |
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112 disp([num2str(nn)," continuous states, ", num2str(nz)," discrete states"]); |
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113 if( nn+nz > 0) |
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114 disp("State(s):") |
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115 xi = (nn+1):(nn+nz); |
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116 xd = zeros(1,nn+nz); |
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117 if(!isempty(xi)) |
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118 xd(xi) = 1; |
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119 endif |
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120 disp(__outlist__(sysgetsignals(sys,"st")," ",xd)); |
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121 else |
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122 disp("State(s): none"); |
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123 endif |
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124 |
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125 ## display matrix values? |
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126 dmat = (max( [ (nn+nz), mm, pp ] ) <= 32); |
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127 |
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128 printf("A matrix: %d x %d\n",sysdimensions(sys,"st"), |
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129 sysdimensions(sys,"st")); |
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130 [aa,bb,cc,dd] = sys2ss(sys); |
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131 if(dmat) disp(aa); endif |
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132 |
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133 printf("B matrix: %d x %d\n",sysdimensions(sys,"st"), |
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134 sysdimensions(sys,"in")); |
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135 if(dmat) disp(bb); endif |
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136 |
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137 printf("C matrix: %d x %d\n",sysdimensions(sys,"out"), |
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138 sysdimensions(sys,"st")); |
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139 if(dmat) disp(cc); endif |
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140 |
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141 printf("D matrix: %d x %d\n",sysdimensions(sys,"out"), |
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142 sysdimensions(sys,"in")); |
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143 if(dmat) disp(dd); endif |
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144 endif |
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145 |
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146 if(nargout >= 1) |
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147 retsys = sys; |
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148 endif |
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149 |
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150 ## restore global variable |
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151 |
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152 endfunction |
