如何解决报错信息：Error in UseMethod(“filter_”) 在使用dplyr包的filter() 时候

报错信息如下：

 

Error in UseMethod("filter_") : 
  no applicable method for 'filter_' applied to an object of class "character"
Calls: %>% ... freduce ->  -> filter -> filter.default -> filter_
In addition: Warning message:
`filter_()` is deprecated as of dplyr 0.7.0.
Please use `filter()` instead.
See vignette('programming') for more help
This warning is displayed once every 8 hours.
Call `lifecycle::last_warnings()` to see where this warning was generated. 
Execution halted

 

最开始我以为这个method是我用错了成filter_,

后面经过查询脚本和网上资料才知道，是因为输入的文件不是tibble、data.frame格式。

 

情况1: 忘记读入文件了,我是因为这个原因报错

file <- args[1] 

情况2：当然还有可能是输入的是matrix，这时候需要把matrix转换成data.frame格式 

 

例子如下

> a <- matrix(1:9, ncol =3)
> colnames(a) <- c("test1","test2","test3")
> a
     test1 test2 test3
[1,]     1     4     7
[2,]     2     5     8
[3,]     3     6     9
> filter(a, test1 == 2)

报错信息

转换成为tibble/data.frame这个报错就没有了

> filter(as_tibble(a), test1 == 2)
# A tibble: 1 x 3
  test1 test2 test3
    
1     2     5     8

 

参考ref：（感谢参考帖子）

https://stackoverflow.com/questions/57286838/how-to-fix-dplyr-filter-error-in-usemethodfilter