sumreturns the sum of all the values present in its arguments.
sum(..., na.rm = FALSE)
NaN) be removed?
...are of type integer or logical, then the sum is integer, and in that case the result will be
NA(with a warning) if integer overflow occurs. Otherwise it is a length-one numeric or complex vector.NB: the sum of an empty set is zero, by definition.
Summarygroup generic. For this to work properly, the arguments
...should be unnamed, and dispatch is on the first argument.
NaN value in
any of the arguments will cause a value of
be returned, otherwise
NaN values are ignored.
Logical true values are regarded as one, false values as zero.
For historical reasons,
NULL is accepted and treated as if it
Loss of accuracy can occur when summing values of different signs: this can even occur for sufficiently long integer inputs if the partial sums would cause integer overflow. Where possible extended-precision accumulators are used, but this is platform-dependent.
colSumsfor row and column sums.
## Pass a vector to sum, and it will add the elements together. sum(1:5) ## Pass several numbers to sum, and it also adds the elements. sum(1, 2, 3, 4, 5) ## In fact, you can pass vectors into several arguments, and everything gets added. sum(1:2, 3:5) ## If there are missing values, the sum is unknown, i.e., also missing, .... sum(1:5, NA) ## ... unless we exclude missing values explicitly: sum(1:5, NA, na.rm = TRUE)