CODEWITHSUNDEEP
rstatisticsimputation
Jim O.
Jim O.

Reputation: 1111

Multiple Imputation Exercise

I am reviewing multiple imputations methods in R, and I came across a fundamental yet important question. In the script below, what purpose does the number 7 serve in data[4:10, 3] <- rep(NA, 7)? Is it telling R to repeat NA seven times?

library(mice)
library(Amelia)
library(mi)
library(missForest)
library(Hmisc)
library(mi)

data <- airquality
data[4:10, 3] <- rep(NA, 7) # rows 4 through 10, third column, make it NA
data[1:5, 4] <- NA # rows 1 through 5, fourth column, make it NA

Upvotes: 0

Views: 77

Answers (1)

Julian Zucker
Julian Zucker

Reputation: 564

Yes.

 > rep(NA, 3)
 # [1] NA NA NA
 >rep(NA, 7)
 # [1] NA NA NA NA NA NA NA

Upvotes: 2

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