Population Covariance

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Description

Returns the population covariance of two variables, ml.data.frame fields.

Usage

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cov.pop(x, y)

Arguments

x

a ml.data.frame field.

y

a ml.data.frame field

Details

The function eliminates all pairs for which either the first element or the second element is empty. After the elimination, if the length of the input is 0, the function returns the empty sequence.

Value

The population covariance

Examples

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## Not run: 
 library(rfml)
 locConn <- ml.connect()
 # create a ml.data.frame based on a search
 mlIris <- ml.data.frame(locConn, collection = "iris")
 # return the population covariance
 cov.pop(mlIris$Sepal.Length, mlIris$Petal.Length)

## End(Not run)

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