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regress线性回归建模 显示X秩亏，但还在精度内，R2很低，其他三个参数NAN。
当自变数的数量多于样本数量时，线性回归已无意义。再加上其中任何一个或数个自变数均对目标变数没有作用，则任何形式的数量关系均无实际价值、经不起检验。
2 years ago | 0
| accepted
