Taylor Series Derivative Approximations

Question

CF 2017-1-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319911-taylor-series-derivative-approximations

评论： Torsten 2024-6-30

在 MATLAB Online 中打开

This is what I am trying to achieve:

Write a MATLAB algorithm that evaluates

y′(t) = f(y,t)

y(a) = yo

using a first order Taylor series to approximate the derivative. Test your code by setting

f(y,t) = y − t^2 + 1, with y(0) = 0.5,

and comparing your results to the analytical solution. For your records, in 150 words or less as comments in the code, report the key steps in the code and the step size used to achieve a reasonably accurate answer.

This is what I have:

syms x y t;
a=input('central point: ');
f=input('f(x)=');
v1=input('variable 1: ');
v2=input('variable 2: ');
taylor(f,[v1,v2],a,'Order',2)

So I've written an algorithm that gives the first order taylor series of an input function. I don't know how to use this to approximate the derivative. Any direction would be helpful.