Computes the estimated target matrix based on a given
*NMF* model. The estimation depends on the
underlying NMF model. For example in the standard model
`V ~ W H`

, the target matrix is
estimated by the matrix product `W H`

. In other
models, the estimate may depend on extra
parameters/matrix (cf. Non-smooth NMF in
`NMFns-class`

).

fitted(object, ...) S4 (NMFstd) `fitted`(object, W, H, ...) S4 (NMFOffset) `fitted`(object, W, H, offset = object@offset) S4 (NMFns) `fitted`(object, W, H, S, ...)

- object
- an object that inherit from class
`NMF`

- ...
- extra arguments to allow extension
- W
- a matrix to use in the computation as the basis
matrix in place of
`basis(object)`

. It must be compatible with the coefficient matrix used in the computation (i.e. number of columns in`W`

= number of rows in`H`

). - H
- a matrix to use in the computation as the
coefficient matrix in place of
`coef(object)`

. It must be compatible with the basis matrix used in the computation (i.e. number of rows in`H`

= number of columns in`W`

). - offset
- offset vector
- S
- smoothing matrix to use instead of
`smoothing(object)`

It must be a square matrix compatible with the basis and coefficient matrices used in the computation.

the target matrix estimate as fitted by the model
`object`

This function is a S4 generic function imported from
fitted in the package *stats*. It is
implemented as a pure virtual method for objects of class
`NMF`

, meaning that concrete NMF models must provide
a definition for their corresponding class (i.e.
sub-classes of class `NMF`

). See
`NMF-class`

for more details.

- fitted
`signature(object = "NMF")`

: Pure virtual method for objects of class`NMF-class`

, that should be overloaded by sub-classes, and throws an error if called. - fitted
`signature(object = "NMFstd")`

: Compute the target matrix estimate in*standard NMF models*.The estimate matrix is computed as the product of the two matrix slots

`W`

and`H`

:V ~ W H

- fitted
`signature(object = "NMFOffset")`

: Computes the target matrix estimate for an NMFOffset object.The estimate is computed as:

W H + offset

- fitted
`signature(object = "NMFns")`

: Compute estimate for an NMFns object, according to the Nonsmooth NMF model (cf.`NMFns-class`

).Extra arguments in

`...`

are passed to method`smoothing`

, and are typically used to pass a value for`theta`

, which is used to compute the smoothing matrix instead of the one stored in`object`

. - fitted
`signature(object = "NMFfit")`

: Computes and return the estimated target matrix from an NMF model fitted with function`nmf`

.It is a shortcut for

`fitted(fit(object), ...)`

, dispatching the call to the`fitted`

method of the actual NMF model.

```
# random standard NMF model
x <- rnmf(3, 10, 5)
all.equal(fitted(x), basis(x) %*% coef(x))
```

```
## [1] TRUE
```

```
```