Mercurial > hg > octave-nkf

annotate examples/@polynomial/subsref.m @ 15163:886d1fc9d575 gui

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GUI branch merged in, closing the GUI branch
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Mon, 13 Aug 2012 11:01:26 -0400
parents bf6da2fbfa4e
children
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1 function b = subsref (a, s)
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2 if (isempty (s))
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3 error ("polynomial: missing index");
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4 endif
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5 switch (s(1).type)
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6 case "()"
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7 ind = s(1).subs;
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8 if (numel (ind) != 1)
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9 error ("polynomial: need exactly one index");
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10 else
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11 b = polyval (fliplr (a.poly), ind{1});
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12 endif
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13 case "{}"
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14 ind = s(1).subs;
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15 if (numel (ind) != 1)
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16 error ("polynomial: need exactly one index");
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17 else
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18 if (isnumeric (ind{1}))
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19 b = a.poly(ind{1}+1);
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20 else
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21 b = a.poly(ind{1});
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22 endif
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23 endif
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24 case "."
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25 fld = s.subs;
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26 if (strcmp (fld, "poly"))
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27 b = a.poly;
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28 else
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29 error ("@polynomial/subsref: invalid property \"%s\"", fld);
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30 endif
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31 otherwise
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32 error ("invalid subscript type");
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33 endswitch
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34 if (numel (s) > 1)
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35 b = subsref (b, s(2:end));
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36 endif
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37 endfunction