SUM function

Summary

Summary of the elements of a matrix.

SUM(A)

Arguments

• A: Matrix or data.frame (coerced to a matrix)

Returns

A list including the following components: - row: Vector containing the sum of squares of every row

• col: Vector containing the sum of squares of every column

• mr: Vector containing the mean of every row

• mc: Vector containing the mean of every column

• minc: Vector containing the minimum of every column

• maxc: Vector containing the maximum of every for column

• valueMinr: Vector containing the columns corresponding to the minimum values of every row

• valueMinc: Vector containing the rows corresponding to the minimum values of every column

• valueMaxr: Vector containing the columns corresponding to the maximum values of every row

• valueMaxc: Vector containing the rows corresponding to the maximum values of every column

• ssq: Sum of squares of the matrix

• cumsumr: Matrix containing the cumulative sums of every row

• cumsumc: Matrix containing the cumulative sums of every column

Author(s)

Maria Antonietta Del Ferraro mariaantonietta.delferraro@yahoo.it

Henk A.L. Kiers h.a.l.kiers@rug.nl

Paolo Giordani paolo.giordani@uniroma1.it

Examples

X <- matrix(rnorm(6*3),ncol=3)
summary <- SUM(X)