If you study the output of the leading statistical packages for regression analysis, you will notice that they tend to group the output in the same manner.
如果研究用于回归分析的主要统计软件包的输出，就会发现它们往往是用同样的方式对输出进行分组的。
2
Many use R mainly in an ad hoc way—to plot a histogram here, perform a regression analysis there, and carry out other discrete tasks involving statistical operations.