| prod | R Documentation |
prod returns the product of all the valuespresent in its arguments.
prod(..., na.rm = FALSE)
... | numeric or complex or logical vectors. |
na.rm | logical. Should missing values be removed? |
Ifna.rm isFALSE anNAvalue in any of the arguments will causea value ofNA to be returned, otherwiseNA values are ignored.
This is a generic function: methods can be defined for itdirectly or via theSummary group generic.For this to work properly, the arguments... should beunnamed, and dispatch is on the first argument.
Logical true values are regarded as one, false values as zero.For historical reasons,NULL is accepted and treated as if itwerenumeric(0).
The product, a numeric (of type"double") or complex vector of length one.NB: the product of an empty set is one, by definition.
This is part of the S4Summarygroup generic. Methods for it must use the signaturex, ..., na.rm.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)The New S Language.Wadsworth & Brooks/Cole.
sum,cumprod,cumsum.
‘plotmath’ for the use ofprod in plot annotation.
print(prod(1:7)) == print(gamma(8))
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