Find the geometric mean of a vector or columns of a data.frame.
The geometric mean is the nth root of n products or e to the mean log of x. Useful for describing non-normal, i.e., geometric distributions.
geometric.mean(x,na.rm=TRUE)
x |
a vector or data.frame |
na.rm |
remove NA values before processing |
Useful for teaching how to write functions, also useful for showing the different ways of estimating central tendency.
geometric mean(s) of x or x.df.
Not particularly useful if there are elements that are <= 0.
William Revelle
x <- seq(1,5) x2 <- x^2 x2[2] <- NA X <- data.frame(x,x2) geometric.mean(x) geometric.mean(x2) geometric.mean(X) geometric.mean(X,na.rm=FALSE)
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