NOTE: A finite difference approximation is used for the derivative of the PDF function at 行 424
列 45.
NOTE: GCONV convergence criterion satisfied.
NOTE: At least one element of the (projected) gradient is greater than 1e-3.
WARNING: The final Hessian matrix is full rank but has at least one negative eigenvalue.
Second-order optimality condition violated.
NOTE: 数据集 WORK.NB0COUT 有 2812 个观测和 2 个变量。
NOTE: “PROCEDURE NLMIXED”所用时间(总处理时间):
实际时间 4.28 秒
CPU 时间 4.34 秒
proc nlmixed出现如下结果,那么估计的参数还可信吗?我用proc countreg却没有问题?这是为什么呢?