library(tidyverse)
cow_nmc <- read_csv("/home/steve/Dropbox/data/cow/nmc/6.0/NMC-60-abridged.csv") %>%
select(-version, -stateabb) %>%
mutate_at(vars(-ccode, -year), ~ifelse(. == -9, NA, .)) %>% print()
save(cow_nmc, file="data/cow_nmc.rda")
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