我正在尝试使用R中的cooccur包来确定物种共现。我的数据看起来像示例数据一样格式化，但是我不断得到一个＆＃34;非数字＆＃34;运行数据时出错。当我导入数据时，我声明第一行是标题;但是，我认为我的错误与第一行有关。请指教。
>library(cooccur)
>birds.data <- coocurBirdData
>head(birds.data)
Point BB1 BB2 BM1 BM2 CC1 CC2 CC3 CV1 CV2 ENDO2 ENDO3 ENDON1 EO1G FEBB2 FEE1 FEE2
1 AMCR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
2 AMRO 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3 BASW 1 1 1 0 0 1 1 1 1 0 0 0 1 0 0 0
4 BLCC 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
>cooccur.birds <- cooccur(birds.data,
type="spp_site",
thresh=TRUE,
spp_names=TRUE)
Error in rowSums(spp_site_mat, na.rm = T) : 'x' must be numeric
In addition: Warning message:
In Ops.factor(left, right) : ‘>’ not meaningful for factors
> str(birds.data) #my data
'data.frame': 42 obs. of 51 variables:
$ Point : Factor w/ 42 levels "AmCr","AmRo",..: 1 2 3 4 5 6 7 8 9 10 ...
$ BB1 : int 1 1 1 1 1 1 1 1 1 1 ...
$ BB2 : int 1 1 1 0 0 1 0 0 0 1 ...
$ BM1 : int 1 0 1 0 1 0 0 0 0 0 ...
$ BM2 : int 1 0 0 0 0 0 0 0 0 0 ...
> str(finches) # the example data, which works
'data.frame': 13 obs. of 17 variables:
$ Seymour : int 0 1 1 0 1 0 0 0 0 0 ...
$ Baltra : int 0 1 1 0 1 0 0 0 0 0 ...
$ Isabella : int 1 1 1 1 1 0 1 0 1 1 ...
$ Fernandina : int 1 1 1 1 0 0 1 0 1 1 ...
$ Santiago : int 1 1 1 1 1 0 1 0 1 1 ...
$ Rabida : int 1 1 1 0 1 0 1 0 1 1 ...