如何使数列升为幂数

Question

我有：

cost = c(2^(-5),2^(-3),2^(-1),2^(1),2^(3),2^(5),2^(7),2^(9),2^(11),2^(13),2^(15))

我想要一个更优雅的命令，例如：

seq(from = 2^(-5), to = 2^(15), by = __)

Answer 1

^在两个参数中都被向量化，因此您可以提高2幂的线性顺序：

2^seq(from = -5, to = 15, by = 2)