getdata {ddalpha} | R Documentation

## Data for Classification

### Description

50 multivariate data sets for binary classification. For more details refer http://www.wisostat.uni-koeln.de/de/forschung/software-und-daten/data-for-classification/

The `getdata` function gets the data set from the package, and returns it. The dataset itself does not appear in the global environment and the existing variables with the same name remain unchanged.

### Usage

    # load the data set
    # data(name)

    # load the data set by name
    # data(list = "name")

    # load the data set by name to a variable
    # getdata("name")

### Arguments

`name` | the data set name.

### Format

A data frame with `n` observations on the `d` variables. The last `d+1` column is the class label.

`x[,1:d]`

  numeric values

`x[,d+1]`

  the numeric class label (0 or 1) or (1 or 2)

### Details

The package contains data sets used in the joint project of the University of Cologne and the Hochschule Merseburg "Classifying real-world data with the DDalpha-procedure". Comprehensive description of the methodology, and experimental settings and results of the study are presented in the work:

Mozharovskyi, P., Mosler, K., and Lange, T. (2015). Classifying real-world data with the DDα-procedure. Advances in Data Analysis and Classification 9 287–314.

For a more complete explanation of the technique and further experiments see: Lange, T., Mosler, K., and Mozharovskyi, P. (2014). Fast nonparametric classification based on data depth. Statistical Papers 55 49–69.

50 binary classification tasks have been obtained from partitioning 33 freely accessible data sets. Multiclass problems were reasonably split into binary classification problems, some of the data set were slightly processed by removing objects or attributes and selecting prevailing classes. Each data set is provided with a (short) description and brief descriptive statistics. The name reflects the origination of the data. A letter after the name is a property filter, letters (also their combinations) in brackets separated by "vs" are the classes opposed. The letters (combinations or words) stand for labels of classes (names of properties) and are intuitive. Each description contains a link to the original data.

The data have been collected as open source data in January 2013. Owners of the package decline any responsibility regarding their correctness or consequences of their usage. If you publish material based on these data, please quote the original source. Special requests regarding citations are found on data set's web page.

### Note

List of the datasets:

baby
banknoten
biomed
bloodtransfusion
breast_cancer_wisconsin
bupa
chemdiab_1vs2
chemdiab_1vs3
chemdiab_2vs3
cloud
crabB_MvsF
crabF_BvsO
crabM_BvsO
crabO_MvsF
crab_BvsO
crab_MvsF
cricket_CvsP
diabetes
ecoli_cpvsim
ecoli_cpvspp
ecoli_imvspp
gemsen_MvsF
glass
groessen_MvsF
haberman
heart
hemophilia
indian_liver_patient_1vs2
indian_liver_patient_FvsM
iris_setosavsversicolor
iris_setosavsvirginica
iris_versicolorvsvirginica
irish_ed_MvsF
kidney
pima
plasma_retinol_MvsF
segmentation
socmob_IvsNI
socmob_WvsB
tae
tennis_MvsF
tips_DvsN
tips_MvsF
uscrime_SvsN
vertebral_column
veteran_lung_cancer
vowel_MvsF
wine_1vs2
wine_1vs3
wine_2vs3

Also functional data sets can be loaded:

geneexp
growth
medflies
population
population2010
tecator

### References

Lange, T., Mosler, K., and Mozharovskyi, P. (2014). Fast nonparametric classification based on data depth. Statistical Papers 55 49–69.

Mozharovskyi, P., Mosler, K., and Lange, T. (2015). Classifying real-world data with the DDα-procedure. Advances in Data Analysis and Classification 9 287–314.

The general list of sources consists of:

UCI Machine Learning Repository http://archive.ics.uci.edu/ml
R-packages https://CRAN.R-project.org/
http://stat.cmu.edu
http://stat.ethz.ch/Teaching/Datasets
http://www.stats.ox.ac.uk/pub/PRNN

### See Also

`utils:data`

### Examples

    # load a dataset using data()
    data(hemophilia)
    data(list = "hemophilia")
    rm(hemophilia)

    # load data set using getdata()
    hemophilia = "This is some existing object called 'hemophilia'. It remains unchanged"
    d = getdata("hemophilia")
    head(d)
    print(hemophilia)

    #get the list of all data sets
    names = data(package = "ddalpha")$results[,3]

[Package ddalpha version 1.3.9 Index]