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

  • (A) as.numeric(x)
  • (B) rowsum(x, group, reorder = TRUE, ...)
  • (C) as.order(x)
  • (D) colSums (x, na.rm = FALSE, dims = 1)
  • Correct Answer - Option(B)
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  • Filed under category R Programming
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