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matlab nlinfit函数返回的雅克比矩阵J代表的是么意思。
若A=J'*J, C=inv(A), 则 C 中包含了非线性方程及其参数（统计数）的误差信息，C 的对角线元素代表了对应统计数（标准化）的方差，非对角线元素代表的是相关统计数（标准化）的协方差。所谓标准化是指将离回归方差视为1。
3 years ago | 0
| accepted
