NcontributorsHolding function

Ncontributors with holding-indicator

The aggregates (columns of x) are grouped by a holding indicator. Within each holding group, the number of unique groups (output) is set to be equal.

NcontributorsHolding(x, groups, holdingInd = NULL)

Arguments

• x: A (sparse) dummy matrix
• groups: Vector of group categories
• holdingInd: Vector of holding group categories

Returns

Vector of numbers of unique groups

Details

A representative within the holding group is used to calculate output by Ncontributors. The one with maximal column sum of x is chosen as the representative. Normally this will be an aggregate representing the holding group total. When holdingInd is NULL (default), the function is equivalent to Ncontributors.

Author(s)

Øyvind Langsrud