Function builtin_row_sums 

fn builtin_row_sums(
    args: &[RValue],
    named: &[(String, RValue)],
) -> Result<RValue, RError>

Sum of each row of a matrix or data frame.

@param x numeric matrix or data frame @param na.rm logical: remove NAs before summing? @return numeric vector of length nrow(x) @namespace base