I have a data frame and want to drop variables that having NA only, like sd.
Is there a better way to do so? Thanks in advance!
data <- data.frame(
stringsAsFactors = FALSE,
meastype = c(372, 372, 372, 372, 372, 372, 372, 372, 372, 372),
measid = c(0, 0, 0, 0, 0, 0, 14831, 14832, 14833, 14834),
p90 = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1),
smp = c("N", "N", "N", "N", "N", "N", "N", "N", "N", "N"),
sd = c(NA, NA, NA, NA, NA, NA, NA, NA, NA, NA)
)