Derivative of a polynomial in MATLAB

Question

Fred 2013-2-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/62975-derivative-of-a-polynomial-in-matlab

Hi,

I want to create a series of Hermite polynomials which includes derivative. How can I do that since MATLAB does not have derivative function? This is the polynomial: http://upload.wikimedia.org/math/a/6/a/a6a7ef35134c07aafcdbdefe522ae3cf.png Thanks

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2013-2-11

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/62975-derivative-of-a-polynomial-in-matlab#answer_74535

在 MATLAB Online 中打开

If you have access to the symbolic toolbox, then

syms x
n = 7;
t = num2cell(x[ones(1,n)));
diff(exp(-(x^2)/2), t{:})

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Walter Roberson 2013-2-11

Note that exp(-(x^2)/2) is not a polynomial, and that makes a significant difference to your choices. If it was a polynomial then you would be able to take advantage of http://www.mathworks.com/help/matlab/ref/polyder.html

请先登录，再进行评论。