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annotate scripts/general/strerror.m @ 1576:75077e1455dd

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[project @ 1995-10-19 04:46:37 by jwe] Initial revision
author jwe
date Thu, 19 Oct 1995 04:46:37 +0000
parents
children 5d29638dd524
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1576
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1 # Copyright (C) 1995 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 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18
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19 function msg = strerror (name, err)
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20
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21 # usage: msg = strerror (name, err)
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22 #
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23 # Return the text of an error message for error number `err' from
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24 # function "name".
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25 #
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26 # Messages correspond to the following subroutine versions:
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27 #
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28 # npsol : 4.0
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29 # qpsol : 3.2
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30
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31 if (nargin != 2)
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32 usage ("strerror (name, err)");
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33 endif
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34
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35 if (! isstr (name))
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36 error ("strerror: first argument must be a string");
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37 endif
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38
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39 if (! is_scalar (err))
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40 error ("strerror: second argument must be a scalar");
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41 endif
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42
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43 if (strcmp (name, "fsolve"))
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44
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45 if (err == -2)
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46 msg = "input error\n";
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47 elseif (err == -1)
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48 msg = "error encountered in user-supplied function\n";
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49 elseif (err == 1)
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50 msg = "solution converged to requested tolerance\n";
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51 elseif (err == 4)
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52 msg = "iteration limit exceeded\n";
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53 elseif (err == 3)
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54 msg = "iteration is not making good progress\n";
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55 else
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56 error ("strerror: unrecognized error code for fsolve");
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57 endif
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58
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59 elseif (strcmp (name, "npsol"))
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60
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61 if (err == 0)
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62 msg = "optimal solution found\n";
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63 elseif (err == 1)
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64 msg = "weak local solution found\n";
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65 elseif (err == 2)
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66 msg = "no feasible point for linear constraints and bounds\n";
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67 elseif (err == 3)
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68 msg = "no feasible point found for nonlinear constraints\n";
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69 elseif (err == 4)
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70 msg = "iteration limit reached\n";
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71 elseif (err == 6)
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72 msg = "current point cannot be improved upon\n";
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73 elseif (err == 7)
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74 msg = "user-supplied derivatives appear to be incorrect\n";
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75 elseif (err == 9)
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76 msg = "internal error: invalid input parameter\n";
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77 else
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78 error ("strerror: unrecognized error code for npsol");
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79 endif
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80
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81 elseif (strcmp (name, "qpsol"))
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82
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83 if (err == 0)
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84 msg = "optimal solution found\n";
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85 elseif (err == 1)
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86 msg = "weak local solution found\n";
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87 elseif (err == 2)
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88 msg = "solution appears to be unbounded\n";
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89 elseif (err == 3)
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90 msg = "solution appears optimal, but optimality can't be verified\n";
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91 elseif (err == 4)
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92 msg = "iterates of the QP phase appear to be cycling\n";
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93 elseif (err == 5)
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94 msg = "iteration limit reached during QP phase\n";
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95 elseif (err == 6)
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96 msg = "no feasible point found during LP phase\n";
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97 elseif (err == 7)
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98 msg = "iterates of the LP phase appear to be cycling\n";
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99 elseif (err == 8)
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100 msg = "iteration limit reached during LP phase\n";
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101 elseif (err == 9)
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102 msg = "internal error: invalid input parameter\n";
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103 else
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104 error ("strerror: unrecognized error code for qpsol");
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105 endif
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106
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107 else
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108
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109 error ("strerror: unrecognized function name");
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110
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111 endif
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112
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113 endfunction