matlab数学建模常用代码
时间: 2023-09-08 17:17:20 浏览: 136
在MATLAB中,数学建模有很多常用的代码。以下是一些常见的示例代码:
1. 线性回归:
```matlab
x = [1, 2, 3, 4, 5];
y = [3, 5, 7, 9, 11];
coefficients = polyfit(x, y, 1);
slope = coefficients(1);
intercept = coefficients(2);
```
2. 非线性回归:
```matlab
x = [1, 2, 3, 4, 5];
y = [3, 5, 7, 9, 11];
model = fitnlm(x, y, @(b,x) b(1)*exp(b(2)*x));
coefficients = model.Coefficients.Estimate;
```
3. 数值积分:
```matlab
f = @(x) exp(-x^2); % 定义函数 f(x)
integralResult = integral(f, -Inf, Inf); % 计算从负无穷到正无穷的积分值
```
4. 非线性方程求解:
```matlab
f = @(x) x^2 - 2; % 定义方程 f(x) = 0
solution = fzero(f, 1); % 在初始点 x=1 处求解方程
```
5. 线性规划:
```matlab
f = [2; 3]; % 目标函数系数
A = [1, -1; 3, 1]; % 不等式约束的系数矩阵
b = [2; 5]; % 不等式约束的右侧常数向量
lb = zeros(2, 1); % 变量下界
ub = []; % 变量上界
[x, fval] = linprog(f, A, b, [], [], lb, ub); % 求解线性规划问题
```
这些是数学建模中常用的一些代码示例,但具体的应用场景和需求会有所不同。你可以根据自己的具体问题进行调整和修改。
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