head.piar_index {piar}

Return the first/last parts of an index

Description

Extract the first/last parts of an index as if it were a matrix.

Usage

## S3 method for class 'piar_index'
head(x, n = 6L, ...)

## S3 method for class 'piar_index'
tail(x, n = 6L, ...)

Arguments

x

A price index, as made by, e.g., elemental_index().

n

See head()/tail(). The default takes the first/last 6 levels of x.

...

Not currently used.

Value

A price index that inherits from chainable_piar_index if x is a period-over-period index, or direct_piar_index() if x is a fixed-base index.

See Also

Other index methods: [.piar_index(), aggregate.piar_index(), as.data.frame.piar_index(), chain(), contrib(), is.na.piar_index(), levels.piar_index(), mean.piar_index(), merge.piar_index(), split.piar_index(), stack.piar_index(), time.piar_index(), vcov.aggregate_piar_index()

Examples

index <- as_index(matrix(1:9, 3))

head(index, 1)

tail(index, 1)