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我在为 R Studio 中的分位数回归绘制系数时遇到问题。这是我的代码: plot(summary(rq(data = d, normalized_losses ~ price + highway_mpg + fuel_type, tau = c(0.1, 0.25, 0.5, 0.75, 0.9))))

不幸的是,它没有绘制(仅)fuel_type,它是 2 个级别的因子变量。它得到这个错误:

plot.window(...) 中的错误:无限轴范围 [GEPretty(-inf,inf,5)]

我尝试添加ylim=c(-Inf,Inf),得到类似:

plot(summary(rq(data = d,
            normalized_losses ~ price +  highway_mpg + fuel_type,
            tau = c(0.1, 0.25, 0.5, 0.75, 0.9))), ylim=c(-Inf,Inf))

它似乎有效,但我看不到图中的系数,因为价格太小或highway_mpg太大。

这里的数据:

 symboling normalized_losses make fuel_type aspiration num_of_doors body_style
1         2               164 audi         2        std         four      sedan
2         2               164 audi         2        std         four      sedan
3         1               158 audi         2        std         four      sedan
4         1               158 audi         2      turbo         four      sedan
5         2               192  bmw         2        std          two      sedan
6         0               192  bmw         2        std         four      sedan
  drive_wheels engine_location wheel_base length width height curb_weight engine_type
1          fwd           front      99.80 176.60 66.20  54.30        2337         ohc
2          4wd           front      99.40 176.60 66.40  54.30        2824         ohc
3          fwd           front     105.80 192.70 71.40  55.70        2844             ohc
4          fwd           front     105.80 192.70 71.40  55.90        3086         ohc
5          rwd           front     101.20 176.80 64.80  54.30        2395             ohc
6          rwd           front     101.20 176.80 64.80  54.30        2395         ohc
  num_of_cylinders engine_size fuel_system bore stroke compression_ratio horsepower
1             four         109        mpfi 3.19   3.40             10.00        102
2             five         136        mpfi 3.19   3.40              8.00        115
3             five         136        mpfi 3.19   3.40              8.50        110
4             five         131        mpfi 3.13   3.40              8.30        140
5             four         108        mpfi 3.50   2.80              8.80        101
6             four         108        mpfi 3.50   2.80              8.80        101
  peak_rpm city_mpg highway_mpg price
1     5500       24          30 13950
2     5500       18          22 17450
3     5500       19          25 17710
4     5500       17          20 23875
5     5800       23          29 16430
6     5800       23          29 16925

它只得到前三个系数,没有fuel_type! 绘制系数

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