nonmemica (version 0.9.1)

locf: Impute Missing Vector Values

Description

locf() implements 'last observation carried forward': NA's are imputed with the most recent non-NA value. nocb() is the complement: 'next observation carried backward': NA's are imputed with the next non-NA value. forbak() first executes locf(), then nocb(), so that even leading NAs are imputed. If even one non-NA value is present, forbak() should not return any NA's. bakfor() does the reverse.

Usage

locf(x)
forbak(x)
bakfor(x)
nocb(x)

Arguments

x

a vector possibly with some missing values and some non-missing values

Value

a vector like x

Functions

• locf: locf last observation carried forward

• forbak: forbak locf followed by nocb

• bakfor: bakfor nocb followed by locf

• nocb: nocb next observation carried backward

See Also

Other util: %contains%, as.best, enclose, padded, parens, pool, runhead, text2decimal

Other util: %contains%, as.best, enclose, padded, parens, pool, runhead, text2decimal

Other util: %contains%, as.best, enclose, padded, parens, pool, runhead, text2decimal

Other util: %contains%, as.best, enclose, padded, parens, pool, runhead, text2decimal

Examples

# NOT RUN {
locf(c(NA,1,2,NA,NA,3,NA,4,NA))
nocb(c(NA,1,2,NA,NA,3,NA,4,NA))
forbak(c(NA,1,2,NA,NA,3,NA,4,NA))
# }