Which of the following finds row sums for each level of a grouping variable?

A)  rowMeans(x, na.rm = FALSE, dims = 1)
B)  rowsum(x, group, reorder = TRUE, …)
C)  rowSums (x, na.rm = FALSE, dims = 1)
D)  colMeans(x, na.rm = FALSE, dims = 1)

Correct Answer :   rowMeans(x, na.rm = FALSE, dims = 1)

Explanation : False value leads to unexpected result.

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