cumsd: Cumulativate versions of skewness, kurtosis, sd, adv

In sfeuerriegel/ResearchGroupTools: Collection of Custom Helper Functions

Description

Functions include cumskewness, cumkurtosis, cumadev (average deviation), and cumsd to complete R's set of cumulate functions to match the aggregation functions available in most databases.

Usage

cumsd(x)

cumskewness(x)

cumkurtosis(x)

cumadev(x)

Arguments

x	For cumskewness, cumkurtosis, cumsd, cumadv an integer or numeric vector.

Details

The most common variants cummin, cummax and cumsum are included in the "base" package. In addition, "dplyr" ships a cummean.

Value

Returns a vector of the same length with new elements.

Examples

library(dplyr)

df <- data.frame(x = 1:10, y = rnorm(10))
cumsd(df$x)
df %>%
  mutate_all(funs("mean" = cummean, "sd" = cumsd))

sfeuerriegel/ResearchGroupTools documentation built on May 29, 2019, 8:01 p.m.