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stata在极大似然法的时候会用到迭代,有nolog就是显示迭代过程,没有nolog就是不显示迭代过程
help nolog 可得
The nolog option works with many vital Stata commands, including glm, logistic, streg, and several more. Many Stata commands fit a model by maximum likelihood, and in so doing, they include a report on the iterations of the algorithm towards (it is hoped) eventual convergence. There may be tens or even hundreds or thousands of such lines in a report, which are faithfully recorded in any log file you may have open. Those lines are of little or no statistical interest in most examples and may be omitted by adding the nolog option.
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