inner | R Documentation |
"MixComp"
Generalised inner product and methods for class MixComp. The methods for MixComp provide for very convenient computing with MixAR models.
inner(x, y, star = "*", plus = .mplus)
x |
the first argument. |
y |
the second argument. |
star |
function to apply to pairs of elements from |
plus |
function to apply to combine the results from the pairs, default is addition, as for the usual inner product. |
inner
computes a generalised inner product x . y
, where
multiplication and summation can be replaced by other functions.
The default method of inner
applies star
to the
corresponding pairs of elements and combines them with plus
.
There is no recycling, if x
and y
have different
lengths, an error is raised. The elements of x
and y
are accessed with "[[". plus
should be an n
-ary
operation.
the inner product, the type of the result depends on the arguments
Methods for inner product between a "MixComp"
object and a
vector are similar to a product between a matrix and a vector but
comply with the conventions of class "MixComp"
. For this reason
they are described in the help page for class
"MixComp"
, along with methods for other functions
and operators applied to "MixComp"
objects.
signature(x = "ANY", y = "ANY", star = "ANY", plus = "ANY")
This is the default method, see section Details.
signature(x = "MixComp", y = "missing", star = "missing", plus = "missing")
see "MixComp"
.
signature(x = "MixComp", y = "numeric", star = "missing", plus = "missing")
see "MixComp"
.
signature(x = "numeric", y = "MixComp", star = "missing", plus = "missing")
see "MixComp"
.
signature(x = "MixComp", y = "numeric", star = "ANY", plus = "ANY")
see "MixComp"
.
signature(x = "MixComp", y = "numeric", star = "ANY", plus = "missing")
see "MixComp"
.
"MixComp"
inner(1:3, 2:4) # [1] 20
class(inner(1:3, 2:4)) # [1] "integer"
## compare to:
1:3 %*% 2:4 # 20, but (1,1)-matrix
class(1:3 %*% 2:4) # matrix
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