R中的分位数回归中的绘制系数

时间:2018-09-11 15:09:23

标签: r quantile quantile-regression

我在R Studio中为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(仅绘制)fuel_type,它是2个级别中的因子变量。出现此错误:

  

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

我尝试添加 ylim = c(-Inf,Inf),得到的内容如下:

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))

似乎可行,但由于 price 太小或 highway_mpg 太大,因此无法在图中看到系数。

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

它仅获得前三个系数,而没有fuel_type! Plot coefficients

0 个答案:

没有答案