Getting “NA” when I run a standard deviation

Question

Quick question. I read my csv file into the variable data. It has a column label var, which has numerical values.

When I run the command

Answer 1

There may be Inf or -Inf as values in the data.

Try

is.finite(data)

or

min(data, na.rm = TRUE)
max(data, na.rm = TRUE)

to check if that is indeed the case.