table unclass class(unclass) 這幾個(gè)函數(shù)不太懂意思？也不知其作用？
> table(x)
x
? male female?
? ? ?2? ? ? 3?
> unclass(x)
[1] 2 2 1 1 2
attr(,"levels")
[1] "male"? ?"female"
> class(unclass(x))
[1] "integer"
> ?table
> ?unclass
> ?class(unclass)
李芬要加油
2019-01-09
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2020-08-12
??table ?unclass ?class(unclass)在控制臺(tái)查找 再操作大概就懂了
2019-03-11
table(x)檢查列表屬性u(píng)nclass(x)去除列表屬性