prod
Product of Vector Elements
prod
returns the product of all the values
present in its arguments.
 Keywords
 arith
Usage
prod(..., na.rm = FALSE)
Arguments
 ...
 numeric or complex or logical vectors.
 na.rm
 logical. Should missing values be removed?
Details
If na.rm
is FALSE
an NA
value in any of the arguments will cause
a value of NA
to be returned, otherwise
NA
values are ignored.
This is a generic function: methods can be defined for it
directly or via the Summary
group generic.
For this to work properly, the arguments ...
should be
unnamed, 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 it
were numeric(0)
.
Value

The product, a numeric (of type
"double"
) or complex vector of length one.
NB: the product of an empty set is one, by definition.
S4 methods
This is part of the S4 Summary
group generic. Methods for it must use the signature
x, ..., na.rm
.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
See Also
‘plotmath’ for the use of prod
in plot annotation.
Examples
library(base)
print(prod(1:7)) == print(gamma(8))
Community examples
Pass a vector to `prod()`, and it will multiply the elements together. ```{r} prod(1:5) ``` Pass several numbers to `prod()`, and it also multiplies the elements. ```{r} prod(1, 2, 3, 4, 5) ``` In fact, you can pass vectors into several arguments, and everything gets multiplied. ```{r} prod(1:2, 3:5) ``` If there are any missing values, the product is also missing. ```{r} prod(1:5, NA) ``` You can exclude missing values by setting `na.rm = TRUE`. ```{r} prod(1:5, NA, na.rm = TRUE) ```