Hmisc/rcspline.eval误差

我在R studio中使用Hmisc包输入数据集时出错。有人能告诉我错误是什么，以及如何纠正它吗。我以前没有用同样的方法进行过插补，但从未遇到过这种情况

validimpute <- aregImpute(~DEP_DELAY + TAXI_OUT + TAXI_IN + ARR_DELAY + CRS_ELAPSED_TIME + ACTUAL_ELAPSED_TIME + AIR_TIME + CARRIER_DELAY + WEATHER_DELAY + NAS_DELAY + SECURITY_DELAY + LATE_AIRCRAFT_DELAY, 
    data = validatedata, n.impute = 1)

Fewer than 3 unique knots.  Frequency table of variable:
x
     0      1      2      3      4      5      6      7      8      9     10     11     12     13     14 
830459  13048   7361     82     30     29     33     27      9     12     22     11     13     15     10 
    15     16     17     18     19     20     21     22     23     24     25     26     27     28     29 
    17     12      8      9     16      8     11      9      5      4      6      7      1      1      5 
    30     31     32     33     34     36     39     40     41     43     44     45     46     47     49 
    13      5      7      3      4      3      9      1      2      4      9      1      2      1      4 
    51     52     54     57     58     60     63     66     72     74     77     79     80     89     91 
     1      3      1      1      1      2      4      1      4      2      4      2      4      2      1 
    93     94    107    119    121    124    127    129    132    135    141    142    143    146    150 
     1      1      1      1      1      1      2      1      4      1      1      3      1      1      1 
   162    201    207    349 
     2      1      3      1 


Error in rcspline.eval(z, knots = parms, nk = nk, inclx = TRUE) : 
In addition: Warning message:
In rcspline.eval(z, knots = parms, nk = nk, inclx = TRUE) :
  could not obtain 3 interior knots with default algorithm.
 Used alternate algorithm to obtain 3 knots

---

validimpute设置nk=0以强制非分类变量的线性。
看这个

这也和你在交叉验证中询问的类似

希望这能有所帮助