MATLAB Programming

Example — A Polynomial Class
Having implemented the double method, you can use it to call MATLAB
functions on polynom objects that require double values as inputs. For
example,
size(double(p))
ans =
1 4
The Polynom to Char Converter
The converter to char is a key method because it produces a character string
involving the powers of an independent variable, x. Therefore, once you have
specified x, the string returned is a syntactically correct MATLAB expression,
whichyoucanthenevaluate.
Here is @polynom/char.m.
function s = char(p)
% POLYNOM/CHAR
% CHAR(p) is the string representation of p.c
if all(p.c == 0)
s = '0';
else
d = length(p.c) - 1;
s = [];
for a = p.c;
if a ~= 0;
if ~isempty(s)
if a > 0
s = [s ' + '];
else
s = [s ' - '];
a = -a;
end
end
if a ~= 1 | d == 0
s = [s num2str(a)];
if d > 0
s = [s '*'];
end
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