Question

Which of the following statement finds the maximum for each column? (a) apply(x,2,max) (b) col.max(x) (c) which.min(x) (d) which.max(x) I had been asked this question during an interview for a job. Asked question is from Commands topic in chapter Commands, Packages, Visualizing Data and Linear Regression of R Programming Select the correct answer from above options

Answer 1

The correct answer is (a) apply(x,2,max) The best I can explain: col.max(x) is another way to find which column has the maximum value for each row.