How can I find the index of all NA in a dataframe column?

StackOverflow https://stackoverflow.com/questions/23070665

  •  03-07-2023
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题

I have a dataframe and in a particular column I want to find the index of all NA values. How can I do it?

有帮助吗？

解决方案 

which(is.na(my.df$col.I.care.about))
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