scale
scale
Scales a 'timeSeries' object.
- Keywords
- chron
Details
scale is a function to center and/or scale the columns of a
'timeSeries' object.
The value of center determines how column centering is performed.
If center is a numeric vector with length equal to the number
of columns of x, then each column of x has the corresponding
value from center subtracted from it. If center is TRUE
then centering is done by subtracting the column means (omitting NAs)
of x from their corresponding columns, and if center
is FALSE, no centering is done.
The value of scale determines how column scaling is performed
(after centering). If scale is a numeric vector with length equal
to the number of columns of x, then each column of x is
divided by the corresponding value from scale. If scale
is TRUE then scaling is done by dividing the (centered) columns of
x by their standard deviations if center is TRUE, and
the root mean square otherwise. If scale is FALSE, no
scaling is done.
Value
- Returns a centered and/or scaled 'timeSeries' object.
Examples
library(timeSeries)
## Load Series:
x <- 100* LPP2005REC[, c("SBI", "SPI")]
## Scale and Center -
X <- scale(x)
hist(X[, 1], prob=TRUE)
s <- seq(-3, 3, length=201)
lines(s, dnorm(s), col="red")