R: Return the first or last part of a dfm

head.dfm {quanteda} | R Documentation

## Return the first or last part of a dfm

### Description

For a dfm object, return the dfm with only the first or last `n` documents.

### Usage

    ## S3 method for class 'dfm'
    head(x, n = 6L, ...)

    ## S3 method for class 'dfm'
    tail(x, n = 6L, ...)

### Arguments

`x` | a dfm object
`n` | an integer vector of length up to `dim(x)` (or 1, for non-dimensioned objects). Values specify the indices to be selected in the corresponding dimension (or along the length) of the object. A positive value of `n[i]` includes the first/last `n[i]` indices in that dimension, while a negative value excludes the last/first `abs(n[i])`, including all remaining indices. `NA` or non-specified values (when `length(n) < length(dim(x))`) select all indices in that dimension. Must contain at least one non-missing value.
`...` | arguments to be passed to or from other methods.

### Value

A dfm class object corresponding to the subset of documents determined by by `n`.

### Examples

    head(data_dfm_lbgexample, 3)
    head(data_dfm_lbgexample, -4)

    tail(data_dfm_lbgexample)
    tail(data_dfm_lbgexample, n = 3)

[Package quanteda version 3.1.0 Index]