Why does as.integer doesn't change data right

Question

Why when I load a data and run as.integer function get wrong results. Mean, it doen't convert data in integer format but the values are completely changed.

cetaceans_raw <- read.csv("https://raw.githubusercontent.com/rfordatascience/tidytuesday/master/data/2018/2018-12-18/allCetaceanData.csv")


cetaceans_raw %>%   mutate(birthYear = as.integer(birthYear))

please share your data and code so we can see what the issue is. — Mike, Jul 01 '19 at 18:30

score 1 · Answer 1 · answered Jul 01 '19 at 18:29

1

r is likely importing the data as.factor(), and then when you use the as.numeric(), r gives the factors an indexed value 1:length(unique(birthYear)). try:

cetaceans_raw %>%   mutate(birthYear = as.integer(as.character(birthYear)))

answered Jul 01 '19 at 18:29

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Why does as.integer doesn't change data right

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