How do I replace columns with fewer than x values with NA in R -


i have matrix columns have 10 rows. want replace values in each column has fewer 10 rows. how accomplish in r?

thanks

you can try this

df[df==""] <- na   name dist 1       0 2    <na> 3     100 4       2 5       1 6       4 7    <na> 8       1 9       1

#data

df <- data.frame(name = rep("a",9), dist = c(0,"",100,2,1,4,"",1,1))

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