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annotate liboctave/array/dim-vector.cc @ 17769:49a5a4be04a1

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maint: Use GNU style coding conventions for code in liboctave/ * liboctave/array/Array-C.cc, liboctave/array/Array-b.cc, liboctave/array/Array-ch.cc, liboctave/array/Array-d.cc, liboctave/array/Array-f.cc, liboctave/array/Array-fC.cc, liboctave/array/Array-util.cc, liboctave/array/Array-util.h, liboctave/array/Array.cc, liboctave/array/Array.h, liboctave/array/Array3.h, liboctave/array/CColVector.cc, liboctave/array/CColVector.h, liboctave/array/CDiagMatrix.cc, liboctave/array/CDiagMatrix.h, liboctave/array/CMatrix.cc, liboctave/array/CMatrix.h, liboctave/array/CNDArray.cc, liboctave/array/CNDArray.h, liboctave/array/CRowVector.cc, liboctave/array/CRowVector.h, liboctave/array/CSparse.cc, liboctave/array/CSparse.h, liboctave/array/DiagArray2.h, liboctave/array/MArray.cc, liboctave/array/MArray.h, liboctave/array/MDiagArray2.cc, liboctave/array/MDiagArray2.h, liboctave/array/MSparse.cc, liboctave/array/MSparse.h, liboctave/array/MatrixType.cc, liboctave/array/MatrixType.h, liboctave/array/PermMatrix.h, liboctave/array/Range.cc, liboctave/array/Range.h, liboctave/array/Sparse.cc, liboctave/array/Sparse.h, liboctave/array/boolMatrix.cc, liboctave/array/boolMatrix.h, liboctave/array/boolNDArray.cc, liboctave/array/boolNDArray.h, liboctave/array/boolSparse.cc, liboctave/array/boolSparse.h, liboctave/array/chMatrix.cc, liboctave/array/chMatrix.h, liboctave/array/chNDArray.cc, liboctave/array/chNDArray.h, liboctave/array/dColVector.h, liboctave/array/dDiagMatrix.cc, liboctave/array/dDiagMatrix.h, liboctave/array/dMatrix.cc, liboctave/array/dMatrix.h, liboctave/array/dNDArray.cc, liboctave/array/dNDArray.h, liboctave/array/dRowVector.h, liboctave/array/dSparse.cc, liboctave/array/dSparse.h, liboctave/array/dim-vector.cc, liboctave/array/dim-vector.h, liboctave/array/fCColVector.cc, liboctave/array/fCColVector.h, liboctave/array/fCDiagMatrix.cc, liboctave/array/fCDiagMatrix.h, liboctave/array/fCMatrix.cc, liboctave/array/fCMatrix.h, liboctave/array/fCNDArray.cc, liboctave/array/fCNDArray.h, liboctave/array/fCRowVector.cc, liboctave/array/fCRowVector.h, liboctave/array/fColVector.h, liboctave/array/fDiagMatrix.cc, liboctave/array/fDiagMatrix.h, liboctave/array/fMatrix.cc, liboctave/array/fMatrix.h, liboctave/array/fNDArray.cc, liboctave/array/fNDArray.h, liboctave/array/fRowVector.h, liboctave/array/idx-vector.cc, liboctave/array/idx-vector.h, liboctave/array/intNDArray.cc, liboctave/array/intNDArray.h, liboctave/cruft/misc/blaswrap.c, liboctave/cruft/misc/quit.cc, liboctave/numeric/CmplxCHOL.cc, liboctave/numeric/CmplxCHOL.h, liboctave/numeric/CmplxGEPBAL.cc, liboctave/numeric/CmplxGEPBAL.h, liboctave/numeric/CmplxHESS.h, liboctave/numeric/CmplxLU.cc, liboctave/numeric/CmplxLU.h, liboctave/numeric/CmplxQR.cc, liboctave/numeric/CmplxQRP.cc, liboctave/numeric/CmplxQRP.h, liboctave/numeric/CmplxSCHUR.h, liboctave/numeric/CmplxSVD.cc, liboctave/numeric/CmplxSVD.h, liboctave/numeric/CollocWt.h, liboctave/numeric/DAE.h, liboctave/numeric/DAEFunc.h, liboctave/numeric/DAERT.h, liboctave/numeric/DAERTFunc.h, liboctave/numeric/DASPK.cc, liboctave/numeric/DASRT.cc, liboctave/numeric/DASRT.h, liboctave/numeric/DASSL.cc, liboctave/numeric/DET.h, liboctave/numeric/EIG.cc, liboctave/numeric/EIG.h, liboctave/numeric/LSODE.cc, liboctave/numeric/ODE.h, liboctave/numeric/ODEFunc.h, liboctave/numeric/ODES.h, liboctave/numeric/ODESFunc.h, liboctave/numeric/Quad.cc, liboctave/numeric/Quad.h, liboctave/numeric/SparseCmplxCHOL.h, liboctave/numeric/SparseCmplxLU.cc, liboctave/numeric/SparseCmplxLU.h, liboctave/numeric/SparseCmplxQR.cc, liboctave/numeric/SparseCmplxQR.h, liboctave/numeric/SparseQR.cc, liboctave/numeric/SparseQR.h, liboctave/numeric/SparsedbleCHOL.h, liboctave/numeric/SparsedbleLU.cc, liboctave/numeric/SparsedbleLU.h, liboctave/numeric/base-aepbal.h, liboctave/numeric/base-dae.h, liboctave/numeric/base-de.h, liboctave/numeric/base-lu.cc, liboctave/numeric/base-lu.h, liboctave/numeric/base-min.h, liboctave/numeric/base-qr.h, liboctave/numeric/bsxfun.h, liboctave/numeric/dbleCHOL.cc, liboctave/numeric/dbleCHOL.h, liboctave/numeric/dbleGEPBAL.h, liboctave/numeric/dbleHESS.h, liboctave/numeric/dbleLU.cc, liboctave/numeric/dbleLU.h, liboctave/numeric/dbleQR.cc, liboctave/numeric/dbleQRP.cc, liboctave/numeric/dbleQRP.h, liboctave/numeric/dbleSCHUR.cc, liboctave/numeric/dbleSCHUR.h, liboctave/numeric/dbleSVD.cc, liboctave/numeric/dbleSVD.h, liboctave/numeric/eigs-base.cc, liboctave/numeric/fCmplxAEPBAL.cc, liboctave/numeric/fCmplxAEPBAL.h, liboctave/numeric/fCmplxCHOL.cc, liboctave/numeric/fCmplxCHOL.h, liboctave/numeric/fCmplxGEPBAL.cc, liboctave/numeric/fCmplxGEPBAL.h, liboctave/numeric/fCmplxHESS.h, liboctave/numeric/fCmplxLU.cc, liboctave/numeric/fCmplxLU.h, liboctave/numeric/fCmplxQR.cc, liboctave/numeric/fCmplxQR.h, liboctave/numeric/fCmplxQRP.cc, liboctave/numeric/fCmplxQRP.h, liboctave/numeric/fCmplxSCHUR.cc, liboctave/numeric/fCmplxSCHUR.h, liboctave/numeric/fCmplxSVD.h, liboctave/numeric/fEIG.cc, liboctave/numeric/fEIG.h, liboctave/numeric/floatCHOL.cc, liboctave/numeric/floatCHOL.h, liboctave/numeric/floatGEPBAL.cc, liboctave/numeric/floatGEPBAL.h, liboctave/numeric/floatHESS.h, liboctave/numeric/floatLU.cc, liboctave/numeric/floatLU.h, liboctave/numeric/floatQR.cc, liboctave/numeric/floatQRP.cc, liboctave/numeric/floatQRP.h, liboctave/numeric/floatSCHUR.cc, liboctave/numeric/floatSCHUR.h, liboctave/numeric/floatSVD.cc, liboctave/numeric/floatSVD.h, liboctave/numeric/lo-mappers.cc, liboctave/numeric/lo-mappers.h, liboctave/numeric/lo-specfun.cc, liboctave/numeric/lo-specfun.h, liboctave/numeric/oct-convn.cc, liboctave/numeric/oct-fftw.cc, liboctave/numeric/oct-fftw.h, liboctave/numeric/oct-norm.cc, liboctave/numeric/oct-rand.cc, liboctave/numeric/oct-rand.h, liboctave/numeric/randgamma.c, liboctave/numeric/randgamma.h, liboctave/numeric/randmtzig.c, liboctave/numeric/randpoisson.c, liboctave/numeric/randpoisson.h, liboctave/numeric/sparse-base-chol.h, liboctave/numeric/sparse-base-lu.h, liboctave/numeric/sparse-dmsolve.cc, liboctave/operators/Sparse-diag-op-defs.h, liboctave/operators/Sparse-op-defs.h, liboctave/operators/mx-inlines.cc, liboctave/system/dir-ops.h, liboctave/system/file-ops.cc, liboctave/system/file-stat.cc, liboctave/system/file-stat.h, liboctave/system/lo-sysdep.cc, liboctave/system/lo-sysdep.h, liboctave/system/mach-info.cc, liboctave/system/mach-info.h, liboctave/system/oct-env.cc, liboctave/system/oct-group.cc, liboctave/system/oct-syscalls.cc, liboctave/system/oct-syscalls.h, liboctave/system/oct-time.h, liboctave/system/tempname.c, liboctave/util/action-container.h, liboctave/util/base-list.h, liboctave/util/cmd-edit.cc, liboctave/util/cmd-edit.h, liboctave/util/cmd-hist.cc, liboctave/util/cmd-hist.h, liboctave/util/data-conv.cc, liboctave/util/data-conv.h, liboctave/util/kpse.cc, liboctave/util/lo-array-gripes.cc, liboctave/util/lo-cieee.c, liboctave/util/lo-regexp.cc, liboctave/util/lo-utils.cc, liboctave/util/oct-alloc.cc, liboctave/util/oct-base64.cc, liboctave/util/oct-binmap.h, liboctave/util/oct-cmplx.h, liboctave/util/oct-glob.cc, liboctave/util/oct-inttypes.cc, liboctave/util/oct-inttypes.h, liboctave/util/oct-locbuf.cc, liboctave/util/oct-locbuf.h, liboctave/util/oct-mem.h, liboctave/util/oct-mutex.cc, liboctave/util/oct-refcount.h, liboctave/util/oct-shlib.cc, liboctave/util/oct-shlib.h, liboctave/util/oct-sort.cc, liboctave/util/oct-sort.h, liboctave/util/pathsearch.cc, liboctave/util/pathsearch.h, liboctave/util/sparse-util.cc, liboctave/util/str-vec.cc, liboctave/util/str-vec.h, liboctave/util/unwind-prot.h, liboctave/util/url-transfer.cc, liboctave/util/url-transfer.h: Use GNU style coding conventions.
author Rik <rik@octave.org>
date Sat, 26 Oct 2013 18:57:05 -0700
parents d63878346099
children 8e056300994b
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1 /*
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2
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3 Copyright (C) 2003-2013 John W. Eaton
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4 Copyirght (C) 2009, 2010 VZLU Prague
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <iostream>
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29
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30 #include "dim-vector.h"
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31
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32 // The maximum allowed value for a dimension extent. This will normally be a
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33 // tiny bit off the maximum value of octave_idx_type.
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34 // Currently 1 is subtracted to allow safe conversion of any 2D Array into
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35 // Sparse, but this offset may change in the future.
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36 octave_idx_type
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37 dim_vector::dim_max (void)
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38 {
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39 return std::numeric_limits<octave_idx_type>::max () - 1;
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40 }
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41
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42 void
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43 dim_vector::chop_all_singletons (void)
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44 {
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45 make_unique ();
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47 int j = 0;
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48 int l = ndims ();
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49
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50 for (int i = 0; i < l; i++)
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51 {
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52 if (rep[i] != 1)
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53 rep[j++] = rep[i];
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54 }
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56 if (j == 1)
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57 rep[1] = 1;
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58
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59 ndims () = j > 2 ? j : 2;
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60 }
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61
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62 std::string
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63 dim_vector::str (char sep) const
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64 {
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65 std::ostringstream buf;
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66
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67 for (int i = 0; i < length (); i++)
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68 {
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69 buf << elem (i);
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70
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71 if (i < length () - 1)
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72 buf << sep;
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73 }
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74
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75 std::string retval = buf.str ();
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76
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77 return retval;
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78 }
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80 int
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81 dim_vector::num_ones (void) const
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82 {
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83 int retval = 0;
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84
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85 for (int i = 0; i < length (); i++)
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diff changeset
86 if (elem (i) == 1)
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87 retval++;
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88
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89 return retval;
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90 }
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91
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92 octave_idx_type
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93 dim_vector::safe_numel (void) const
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94 {
10830
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95 octave_idx_type idx_max = dim_max ();
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96 octave_idx_type n = 1;
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97 int n_dims = length ();
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98
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99 for (int i = 0; i < n_dims; i++)
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100 {
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101 n *= rep[i];
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102 if (rep[i] != 0)
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103 idx_max /= rep[i];
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104 if (idx_max <= 0)
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105 throw std::bad_alloc ();
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106 }
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107
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108 return n;
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109 }
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110
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diff changeset
111 dim_vector
10683
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112 dim_vector::squeeze (void) const
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113 {
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114 dim_vector new_dims = *this;
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115
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116 bool dims_changed = 1;
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117
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118 int k = 0;
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119
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120 for (int i = 0; i < length (); i++)
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121 {
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122 if (elem (i) == 1)
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123 dims_changed = true;
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124 else
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125 new_dims(k++) = elem (i);
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126 }
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127
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128 if (dims_changed)
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129 {
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130 if (k == 0)
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131 new_dims = dim_vector (1, 1);
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132 else if (k == 1)
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133 {
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134 // There is one non-singleton dimension, so we need
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135 // to decide the correct orientation.
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136
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diff changeset
137 if (elem (0) == 1)
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138 {
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139 // The original dimension vector had a leading
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140 // singleton dimension.
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141
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142 octave_idx_type tmp = new_dims(0);
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143
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144 new_dims.resize (2);
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145
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146 new_dims(0) = 1;
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147 new_dims(1) = tmp;
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148 }
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149 else
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150 {
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151 // The first element of the original dimension vector
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152 // was not a singleton dimension.
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153
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154 new_dims.resize (2);
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155
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156 new_dims(1) = 1;
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157 }
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158 }
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159 else
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Rik <rik@octave.org>
parents: 14846
diff changeset
160 new_dims.resize (k);
10683
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161 }
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diff changeset
162
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163 return new_dims;
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164 }
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165
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parents: 14846
diff changeset
166 // This is the rule for cat(). cat (dim, A, B) works if one
10715
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diff changeset
167 // of the following holds, in this order:
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diff changeset
168 //
15018
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diff changeset
169 // 1. size (A, k) == size (B, k) for all k != dim.
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diff changeset
170 // In this case, size (C, dim) = size (A, dim) + size (B, dim) and
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diff changeset
171 // other sizes remain intact.
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diff changeset
172 //
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diff changeset
173 // 2. A is 0x0, in which case B is the result
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diff changeset
174 // 3. B is 0x0, in which case A is the result
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diff changeset
175
10683
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176 bool
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177 dim_vector::concat (const dim_vector& dvb, int dim)
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diff changeset
178 {
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179 int orig_nd = ndims (), ndb = dvb.ndims ();
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180 int new_nd = dim < ndb ? ndb : dim + 1;
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diff changeset
181 if (new_nd > orig_nd)
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182 resize (new_nd, 1);
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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183 else
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diff changeset
184 new_nd = orig_nd;
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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diff changeset
185
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diff changeset
186 make_unique ();
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diff changeset
187
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188 bool match = true;
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189
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diff changeset
190 for (int i = 0; i < ndb; i++)
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diff changeset
191 {
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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diff changeset
192 if (i != dim && rep[i] != dvb(i))
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diff changeset
193 {
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diff changeset
194 match = false;
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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195 break;
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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diff changeset
196 }
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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parents:
diff changeset
197 }
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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parents:
diff changeset
198
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diff changeset
199 for (int i = ndb; i < new_nd; i++)
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diff changeset
200 {
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diff changeset
201 if (i != dim && rep[i] != 1)
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parents:
diff changeset
202 {
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diff changeset
203 match = false;
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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204 break;
4fdb36ffa066 omitted file from 10681:0ba9bd294421
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parents:
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205 }
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parents:
diff changeset
206 }
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parents:
diff changeset
207
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parents:
diff changeset
208 if (match)
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diff changeset
209 rep[dim] += (dim < ndb ? dvb(dim) : 1);
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210 else
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diff changeset
211 {
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212 // Dimensions don't match. The only allowed fix is
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213 // to omit 0x0.
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diff changeset
214 if (ndb == 2 && dvb(0) == 0 && dvb(1) == 0)
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diff changeset
215 match = true;
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216 else if (orig_nd == 2 && rep[0] == 0 && rep[1] == 0)
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diff changeset
217 {
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diff changeset
218 *this = dvb;
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diff changeset
219 match = true;
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diff changeset
220 }
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parents:
diff changeset
221 }
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diff changeset
222
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diff changeset
223 chop_trailing_singletons ();
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diff changeset
224
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225 return match;
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parents:
diff changeset
226 }
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diff changeset
227
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diff changeset
228 // Rules for horzcat/vertcat are yet looser.
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229 // two arrays A, B can be concatenated
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230 // horizontally (dim = 2) or vertically (dim = 1) if one of the
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231 // following holds, in this order:
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232 //
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233 // 1. cat (dim, A, B) works
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234 //
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235 // 2. A, B are 2D and one of them is an empty vector, in which
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236 // case the result is the other one except if both of them
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237 // are empty vectors, in which case the result is 0x0.
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238
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239 bool
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240 dim_vector::hvcat (const dim_vector& dvb, int dim)
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241 {
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242 if (concat (dvb, dim))
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243 return true;
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244 else if (length () == 2 && dvb.length () == 2)
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245 {
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246 bool e2dv = rep[0] + rep[1] == 1;
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247 bool e2dvb = dvb(0) + dvb(1) == 1;
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248 if (e2dvb)
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249 {
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250 if (e2dv)
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251 *this = dim_vector ();
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252 return true;
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253 }
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254 else if (e2dv)
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255 {
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256 *this = dvb;
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257 return true;
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258 }
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259 }
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260
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261 return false;
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262 }
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263
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264 dim_vector
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265 dim_vector::redim (int n) const
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266 {
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267 int n_dims = length ();
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268
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269 if (n_dims == n)
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270 return *this;
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271 else if (n_dims < n)
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272 {
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273 dim_vector retval = alloc (n);
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274
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275 for (int i = 0; i < n_dims; i++)
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276 retval.rep[i] = rep[i];
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277
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278 for (int i = n_dims; i < n; i++)
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279 retval.rep[i] = 1;
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280
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281 return retval;
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282 }
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283 else
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284 {
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285 if (n < 1) n = 1;
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286
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287 dim_vector retval = alloc (n);
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288
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289 retval.rep[1] = 1;
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290
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291 for (int i = 0; i < n-1; i++)
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292 retval.rep[i] = rep[i];
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293
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294 int k = rep[n-1];
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295 for (int i = n; i < n_dims; i++)
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296 k *= rep[i];
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297
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298 retval.rep[n-1] = k;
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299
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300 return retval;
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301 }
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302 }