vectorN = c("Hello","How","are","you","you","are","Hello")
factorVectorN = factor(vectorN)
#Value of levels(factorVectorN) is c("are", "Hello", "How", "you")
all(levels(factorVectorN)[factorVectorN] == vectorN) # returns TRUE
請問您能解釋一下,如何在上面的例子中級別(factorVectorN)[factorVectorN]創建與vectorN相同的向量?levels(factorObject)[factorObject]如何生成完整的向量?