R: Split Data

splitData {RecordLinkage} | R Documentation

## Split Data

### Description

Splits a data set into two sets with desired proportions.

### Usage

    splitData(dataset, prop, keep.mprop = FALSE, num.non = 0, des.mprop = 0,
    use.pred = FALSE)

### Arguments

`dataset` | Object of class `RecLinkData`. Data pairs to split.
`prop` | Real number between 0 and 1. Proportion of data pairs to form the training set.
`keep.mprop` | Logical. Whether the ratio of matches should be retained.
`num.non` | Positive Integer. Desired number on non-matches in the training set.
`des.mprop` | Real number between 0 and 1. Desired proportion of matches to non-matches in the training set.
`use.pred` | Logical. Whether to apply match ratio to previous classification results instead of true matching status.

### Value

A list of `RecLinkData` objects.

`train` | The sampled training data.
`valid` | All other record pairs

The sampled data are stored in the `pairs` attributes of `train` and `valid`. If present, the attributes `prediction` and `Wdata` are split and the corresponding values saved. All other attributes are copied to both data sets.

If the number of desired matches or non-matches is higher than the number actually present in the data, the maximum possible number is chosen and a warning issued.

### Author(s)

Andreas Borg, Murat Sariyar

### See Also

`genSamples` for generating training data based on unsupervised classification.

### Examples

    data(RLdata500)
    pairs=compare.dedup(RLdata500, identity=identity.RLdata500,
      blockfld=list(1,3,5,6,7))

    # split into halves, do not enforce match ratio
    l=splitData(pairs, prop=0.5)
    summary(l$train)
    summary(l$valid)

    # split into 1/3 and 2/3, retain match ration
    l=splitData(pairs, prop=1/3, keep.mprop=TRUE)
    summary(l$train)
    summary(l$valid)

    # generate a training set with 100 non-matches and 10 matches
    l=splitData(pairs, num.non=100, des.mprop=0.1, keep.mprop=TRUE)
    summary(l$train)
    summary(l$valid)

[Package RecordLinkage version 0.4-12.2 Index]