Calculate the percentage of zeros that I have in a column

Question

I have a column of catch rate data in a DF (df$catch.rate) that contains a combination of decimal values and zeros.

I would like to calculate the percentage of zero

Answer 1

sum(df$catch.rate %in% 0 ) / nrow(df)

I suggest using %in% if you have NA values..... e.g.

x <- c(0,NA,1) 
sum(x == 0 ) / length(x)
#[1] NA