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annotate examples/code/@polynomial/polynomial_superiorto.m @ 20794:e5986cba4ca8

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new octave_value::cell_value method with optional error message * ov.h, ov.cc (octave_value::cell_value): New method. * ov-base.h, ov-base.cc (octave_base_value::cell_value): New default method. * ov-cell.h, ov-cell.cc (octave_cell::cell_value): New method.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Oct 2015 14:41:49 -0400
parents c8240a60dd01
children
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1 ## -*- texinfo -*-
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2 ## @deftypefn {Function File} {} polynomial ()
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3 ## @deftypefnx {Function File} {} polynomial (@var{a})
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4 ## Create a polynomial object representing the polynomial
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5 ##
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6 ## @example
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7 ## a0 + a1 * x + a2 * x^2 + @dots{} + an * x^n
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8 ## @end example
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9 ##
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10 ## @noindent
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11 ## from a vector of coefficients [a0 a1 a2 @dots{} an].
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12 ## @end deftypefn
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13
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14 function p = polynomial (a)
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15 if (nargin == 0)
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16 p.poly = [0];
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17 p = class (p, "polynomial");
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18 elseif (nargin == 1)
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19 if (strcmp (class (a), "polynomial"))
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20 p = a;
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21 elseif (isvector (a) && isreal (a))
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22 p.poly = a(:).';
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23 p = class (p, "polynomial");
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24 else
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25 error ("polynomial: expecting real vector");
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26 endif
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27 else
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28 print_usage ();
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29 endif
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30 superiorto ("double");
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31 endfunction