对比度仅适用于因子

我有一个关于R.的问题

我正在使用一个名为levene.test的测试来测试方差的同质性.

我知道你需要一个至少有两个级别的因子变量才能使它工作.从我看来,我确实至少有两个级别用于我正在使用的因子变量.但不知怎的,我不断得到错误:

> nocorlevene <- levene.test(geno1rs11809462$SIF1, geno1rs11809462$k, correction.method = "correction.factor")

    Error in `contrasts<-`(`*tmp*`, value = contr.funs[1 + isOF[nn]]) : 
      contrasts can be applied only to factors with 2 or more levels

我甚至尝试从二项分布生成变量:

k<-rbinom(1304, 1, 0.5)

然后使用它作为一个因素,但仍然无法正常工作.

最后,我创建了一个3级变量:

k<-sample(c(1,0,2), 1304, replace=T)

但有些人仍然没有工作并得到同样的错误:

nocorlevene < - levene.test(geno1rs11809462 $ SIF1,geno1rs11809462 $ k,correction.method ="zero.removal")

Error in `contrasts<-`(`*tmp*`, value = contr.funs[1 + isOF[nn]]) : 
  contrasts can be applied only to factors with 2 or more levels

这是数据中变量类型的输出:

> str(geno1rs11809462)
'data.frame':   1304 obs. of  16 variables:
 $ id           : chr  "WG0012669-DNA_A03_K05743" "WG0012669-DNA_A04_K05752" "WG0012669-DNA_A05_K05761" "WG0012669-DNA_A06_K05785" ...
 $ rs11809462   : Factor w/ 2 levels "2/1","2/2": 2 2 2 2 2 2 2 2 2 2 ...
  ..- attr(*, "names")= chr  "WG0012669-DNA_A03_K05743" "WG0012669-DNA_A04_K05752" "WG0012669-DNA_A05_K05761" "WG0012669-DNA_A06_K05785" ...
 $ FID          : chr  "9370" "9024" "14291" "4126" ...
 $ AGE_CALC     : num  61 47 NA 62.5 55.6 59.7 46.6 41.2 NA 46.6 ...
 $ MREFSUM      : num  185 325 NA 211 212 ...
 $ NORSOUTH     : Factor w/ 3 levels "0","1","NA": 1 1 3 1 1 1 1 1 3 1 ...
 $ smoke1       : Factor w/ 3 levels "0","1","NA": 2 2 3 1 1 1 2 1 3 1 ...
 $ smoke2       : Factor w/ 3 levels "0","1","NA": 1 1 3 2 2 2 1 2 3 2 ...
 $ ANYCG60      : num  0 0 NA 1 0 0 0 0 NA 1 ...
 $ DCCT_HBA_MEAN: num  7.39 6.93 NA 7.37 7.56 7.86 6.22 8.88 NA 8.94 ...
 $ EDIC_HBA     : num  7.17 7.63 NA 8.66 9.68 7.74 6.59 9.34 NA 7.86 ...
 $ HBAEL        : num  7.3 8.82 NA 9.1 9.3 ...
 $ ELDTED_HBA   : num  7.23 7.76 NA 8.36 9.21 7.92 6.64 9.64 NA 9.09 ...
 $ SIF1         : num  19.6 17 NA 23.8 24.1 ...
 $ sex          : Factor w/ 2 levels "0","1": 1 1 2 2 2 2 1 1 1 1 ...
 $ k            : Factor w/ 3 levels "0","1","2": 1 1 2 3 1 3 3 3 1 2 ...

正如你可以看到变量k,性别分别有3级和2级但不知怎的,我仍然得到错误信息.

> head(geno1rs11809462)
                        id rs11809462   FID AGE_CALC  MREFSUM NORSOUTH smoke1 smoke2 ANYCG60
1 WG0012669-DNA_A03_K05743        2/2  9370     61.0 184.5925        0      1      0       0
2 WG0012669-DNA_A04_K05752        2/2  9024     47.0 325.0047        0      1      0       0
3 WG0012669-DNA_A05_K05761        2/2 14291       NA       NA       NA     NA     NA      NA
4 WG0012669-DNA_A06_K05785        2/2  4126     62.5 211.2557        0      0      1       1
5 WG0012669-DNA_A08_K05802        2/2 11280     55.6 212.2922        0      0      1       0
6 WG0012669-DNA_A09_K05811        2/2 11009     59.7 261.0116        0      0      1       0
  DCCT_HBA_MEAN EDIC_HBA HBAEL ELDTED_HBA    SIF1 sex k
1          7.39     7.17  7.30       7.23 19.6136   0 0
2          6.93     7.63  8.82       7.76 17.0375   0 0
3            NA       NA    NA         NA      NA   1 1
4          7.37     8.66  9.10       8.36 23.8333   1 2
5          7.56     9.68  9.30       9.21 24.1338   1 0
6          7.86     7.74  8.53       7.92 25.7272   1 2

如果有人能给我一些关于为什么会发生这种情况的提示,那就太好了.我只是不知道为什么变量k或性别或具有不同级别在我运行测试时给我错误.

谢谢