- parse()函数能将字符串转换为表达式expression；eval()函数能对表达式求解
> A <- 1:5
> B <- 'print(A)'
> class(B)
[1] "character"
> C <- parse(text = B)
> C
expression(print(A))
> D <- eval(C)
[1] 1 2 3 4 5
> D
[1] 1 2 3 4 5
> A <- 1:5
> B <- 'print(A)'
> class(B)
[1] "character"
> C <- parse(text = B)
> C
expression(print(A))
> D <- eval(C)
[1] 1 2 3 4 5
> D
[1] 1 2 3 4 5
本文标题：R函数学习-eval()和parse()
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