我想要功能重要性。所以我使用插入符号包作为我的数据集：
> dput(head(data,100))
structure(list(Store = c(3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), Sales = c(8314,
8977, 7610, 8864, 8107, 0, 3878, 5080, 5702, 5414, 5600, 5798,
0, 4258, 6679, 7909, 8663, 8625, 9462, 0, 4011, 6316, 6613, 6347,
6180, 6736, 0, 4482, 8149, 7450, 8311, 13261, 10243, 0, 5156,
6222, 5763, 5448, 6757, 5840, 0, 3891, 8074, 7537, 8524, 9780,
10818, 0, 4687, 6181, 5656, 6440, 7127, 6567, 0, 4622, 9685,
0, 9590, 10455, 11594, 0, 4542, 7421, 6475, 5589, 6443, 0, 0,
4613, 7349, 7682, 8226, 8728, 10040, 0, 4149, 7515, 0, 7003,
6043, 5797, 0, 6024, 9083, 7705, 9046, 8719, 9488, 0, 6564, 0,
9971, 9484, 8758, 9447, 0, 4373, 5376, 5570), DayOfWeek = c(5,
4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5,
4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5,
4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5,
4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5,
4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4), Open = c(1, 1,
1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1,
1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1,
1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1,
1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1,
1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1), Promo = c(1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0), StateHoliday = c(4, 3,
2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2,
1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1,
4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4,
3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3,
2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1), SchoolHoliday = structure(c(2L,
2L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 2L,
2L, 2L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 2L, 2L, 2L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L), .Label = c("0", "1"), class = "factor"), DateYear = c(2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015,
2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015, 2015
), DateMonth = c(7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4,
4), DateDay = c(31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20,
19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3,
2, 1, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17,
16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 31, 30,
29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14,
13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 30, 29, 28, 27, 26,
25, 24, 23), DateWeek = c(30, 30, 30, 30, 30, 29, 29, 29, 29,
29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27,
27, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 24,
24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22,
22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20,
20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18,
17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16), StoreType = c(3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3), CompetitionOpen = c(103,
103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103,
103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103,
103, 103, 103, 103, 102, 102, 102, 102, 102, 102, 102, 102, 102,
102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102,
102, 102, 102, 102, 102, 102, 102, 102, 101, 101, 101, 101, 101,
101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101,
101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101,
100, 100, 100, 100, 100, 100, 100, 100), PromoOpen = c(52, 52,
52, 52, 52, 51.75, 51.75, 51.75, 51.75, 51.75, 51.75, 51.75,
51.5, 51.5, 51.5, 51.5, 51.5, 51.5, 51.5, 51.25, 51.25, 51.25,
51.25, 51.25, 51.25, 51.25, 51, 51, 51, 51, 51, 51, 51, 50.75,
50.75, 50.75, 50.75, 50.75, 50.75, 50.75, 50.5, 50.5, 50.5, 50.5,
50.5, 50.5, 50.5, 50.25, 50.25, 50.25, 50.25, 50.25, 50.25, 50.25,
50, 50, 50, 50, 50, 50, 50, 49.75, 49.75, 49.75, 49.75, 49.75,
49.75, 49.75, 49.5, 49.5, 49.5, 49.5, 49.5, 49.5, 49.5, 49.25,
49.25, 49.25, 49.25, 49.25, 49.25, 49.25, 49, 49, 49, 49, 49,
49, 49, 48.75, 48.75, 48.75, 48.75, 48.75, 48.75, 48.75, 48.5,
48.5, 48.5, 48.5), IspromoinSales = c(1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1)), .Names = c("Store", "Sales", "DayOfWeek",
"Open", "Promo", "StateHoliday", "SchoolHoliday", "DateYear",
"DateMonth", "DateDay", "DateWeek", "StoreType", "CompetitionOpen",
"PromoOpen", "IspromoinSales"), sorted = "Store", class = c("data.table",
"data.frame"), row.names = c(NA, -100L), .internal.selfref = <pointer: 0x000000000c610788>)
然后我编写此代码来进行功能训练：
> library(caret)
> set.seed(42)
> model_rf <- caret::train(Sales ~ .,
+ data = data[,-1],
+ method = "rf",
+ trControl = trainControl(method = "repeatedcv",
+ number = 10,
+ repeats = 5,
+ verboseIter = FALSE))
但看看我得到了什么：
出了点问题;缺少所有RMSE指标值： RMSE Rsquared MAE
闵。 ：NA Min。 ：NA Min。 ：NA
1 Qu。：NA 1st Qu。：NA 1st Qu。：NA
中位数：NA中位数：NA中位数：NA
平均值：NaN平均值：NaN平均值：NaN
第三曲：NA第三曲：NA第三曲：NA
最大。 ：NA Max。 ：NA Max。 ：NA
NA＆＃39; s：3 NA＆＃39; s：3 NA＆＃39; s：3
错误：停止另外：有50个或更多警告（使用警告（）来查看 第一次50）
我该如何删除并获得正确的结果？
谢谢你！