Description Usage Arguments Details Slots See Also Examples

The dfm class of object is a type of Matrix-class object with
additional slots, described below. quanteda uses two subclasses of the
`dfm`

class, depending on whether the object can be represented by a
sparse matrix, in which case it is a `dfm`

class object, or if dense,
then a `dfmDense`

object. See Details.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | ```
## S4 method for signature 'dfm'
t(x)
## S4 method for signature 'dfm'
colSums(x, na.rm = FALSE, dims = 1, ...)
## S4 method for signature 'dfm'
rowSums(x, na.rm = FALSE, dims = 1, ...)
## S4 method for signature 'dfm'
colMeans(x, na.rm = FALSE, dims = 1, ...)
## S4 method for signature 'dfm'
rowMeans(x, na.rm = FALSE, dims = 1, ...)
## S4 method for signature 'dfm,numeric'
Arith(e1, e2)
## S4 method for signature 'numeric,dfm'
Arith(e1, e2)
## S4 method for signature 'dfm,index,index,missing'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,index,index,logical'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,missing,missing,missing'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,missing,missing,logical'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,index,missing,missing'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,index,missing,logical'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,missing,index,missing'
x[i, j, ..., drop = TRUE]
## S4 method for signature 'dfm,missing,index,logical'
x[i, j, ..., drop = TRUE]
``` |

`x` |
the dfm object |

`na.rm` |
if |

`dims` |
ignored |

`...` |
additional arguments not used here |

`e1` |
first quantity in "+" operation for dfm |

`e2` |
second quantity in "+" operation for dfm |

`i` |
index for documents |

`j` |
index for features |

`drop` |
always set to |

The `dfm`

class is a virtual class that will contain
dgCMatrix-class.

`weightTf`

the type of term frequency weighting applied to the dfm. Default is

`"frequency"`

, indicating that the values in the cells of the dfm are simple feature counts. To change this, use the`dfm_weight()`

method.`weightFf`

the type of document frequency weighting applied to the dfm. See

`docfreq()`

.`smooth`

a smoothing parameter, defaults to zero. Can be changed using the

`dfm_smooth()`

method.`Dimnames`

These are inherited from Matrix-class but are named

`docs`

and`features`

respectively.

dfm

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