Evaluate an integral using MATLAB
显示 更早的评论
I would like to numerically evaluate the following integral using MATLAB:
∫(3x^2 + 2x + 1) dx
Since I don't have the Symbolic Math Toolbox, how can I use MATLAB to approximate this integral using numerical methods? Could you provide an example?
采纳的回答
Harshavardhan Putta
2023-7-12
编辑：Harshavardhan Putta
2023-7-12
Hi,
I understand that you want to compute integral. If you don't have the Symbolic Math Toolbox, you can approximate the integral numerically using MATLAB's numerical integration functions. One commonly used function is integral, which performs adaptive quadrature integration. Here's an example of how you can use integral to approximate the given integral:
f = @(x) 3*x.^2 + 2*x + 1;
a = 0; % Lower limit of integration
b = 1; % Upper limit of integration
approximation = integral(f, a, b);
Please refer to the following documentation for more information.
I hope this explanation helps!
更多回答（1 个）
If you can't do it manually, getting the indefinite integral is not possible without the symbolic toolbox.
If you want to evaluate the integral in specified limits, use "integral":
类别
在 帮助中心 和 File Exchange 中查找有关 Numerical Integration and Differentiation 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
