How to use poly2list for specific variables?
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Hi there,
In the example 2 of the help for 'poly2list' https://www.mathworks.com/help/symbolic/mupad_ref/poly2list.html?s_tid=srchtitle, it shows as follows:
In this example the polynomial is bivariate, thus exponent vectors are returned:
poly2list((x*(y + 1))^2, [x, y])
How to use this in MATLAB? I tried feval but it shows error:
>> syms x y
>> feval(symengine, 'poly2list', (x*(y + 1))^2, [x, y])
Error using mupadengine/feval (line 163)
The number of arguments is incorrect.
Thanks,
Dan
0 件のコメント
採用された回答
Walter Roberson
2017 年 11 月 30 日
symLIST = @(varargin)feval(symengine,'DOM_LIST',varargin{:});
feval(symengine,'poly2list', (x*(y + 1))^2, symLIST(x,y))
5 件のコメント
Walter Roberson
2017 年 11 月 30 日
varcell = num2cell(X);
feval(symengine,'poly2list', (x*(y + 1))^2, symLIST(varcell{:}))
その他の回答 (1 件)
Karan Gill
2017 年 11 月 30 日
編集済み: Karan Gill
2017 年 12 月 5 日
In general, I don't recommend using MuPAD commands, as the note at the top says.
Is coeffs helpful?
>> syms x y
p = (x*(y + 1))^2;
[C,T] = coeffs(p,[x y]) % C = coeffs, T = terms
C =
[ 1, 2, 1]
T =
[ x^2*y^2, x^2*y, x^2]
参考
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