max
Basics
max is a simple function that returns the maximum value in a vector or column in a data.frame.
Some additional applications of max include comparing the maximum values between columns, finding the maximum value of a row, and finding a string that’s alphabetically last in a list.
Examples
What is the biggest value in the vector weights?
Click to see solution
weights <- c(147, 280, 180, 190, 145)
max(weights)[1] 280
What is the largest response over an experiment data.frame with trial1, trial2, and trial3 as its trial columns?
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max(c(experiment$trial1, experiment$trial2, experiment$trial3))[1] 87
How do we get the maximum value a vector if not all of its values are filled in?
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See our mean page for information on na.rm.
vec <- c(NA, 45, 444, 13, 98, NA)
max(vec, na.rm = TRUE)[1] 444