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如果我在数据框中对数值列进行缩放和居中(每列中的每个值除以各自的列SD,并且从每个值中减去各列的平均值)然后,我将其转换为原始值。R - 将缩放和居中的数据转换为原始值
在下面的简单示例中,我看到每个列的平均值和SD存储在使用居中应用'scale'后的对象d4中。
d1 <- as.data.frame(seq(1,20,1))
d2 <- as.data.frame(seq(0.11,0.3,0.01))
d3 <- cbind(d1,d2)
names(d3) <- c("A","B")
d4 <- scale(d3,center=TRUE)
d4
A B
[1,] -1.60579308 -1.60579308
[2,] -1.43676223 -1.43676223
[3,] -1.26773138 -1.26773138
[4,] -1.09870053 -1.09870053
[5,] -0.92966968 -0.92966968
[6,] -0.76063883 -0.76063883
[7,] -0.59160798 -0.59160798
[8,] -0.42257713 -0.42257713
[9,] -0.25354628 -0.25354628
[10,] -0.08451543 -0.08451543
[11,] 0.08451543 0.08451543
[12,] 0.25354628 0.25354628
[13,] 0.42257713 0.42257713
[14,] 0.59160798 0.59160798
[15,] 0.76063883 0.76063883
[16,] 0.92966968 0.92966968
[17,] 1.09870053 1.09870053
[18,] 1.26773138 1.26773138
[19,] 1.43676223 1.43676223
[20,] 1.60579308 1.60579308
attr(,"scaled:center")
A B
10.500 0.205
attr(,"scaled:scale")
A B
5.9160798 0.0591608
如何我现在可以使用存储的平均值和SD值从D4原始值