How to print rows greater than N in at least X number of columns?

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How to print rows greater than N in at least X number of columns?



For example, how can I print rows greater than 300 in at least 2 columns?



The following code print rows greater than 300


mtcars[apply(mtcars[, -1], MARGIN = 1, function(x) any(x > 300)), ]




1 Answer
1



A couple ways come to mind:


mtcars[apply(mtcars, 1, FUN = function(x) sum(x > 300) >= 2),]



or


mtcars[rowSums(mtcars > 300) >= 2,]



Which both return


# mpg cyl disp hp drat wt qsec vs am gear carb
# Maserati Bora 15 8 301 335 3.54 3.57 14.6 0 1 5 8





I couldn't get the logic behind the sum(x>300)>=2 though.
– user1883491
Aug 7 at 19:37


sum(x>300)>=2





x > 300 returns a logical vector with TRUE/FALSE for each value in the row. Summing up these logical values returns the number of values in each row that are > 300
– bouncyball
Aug 7 at 19:38


x > 300






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