rmcfs (version 1.1.0)

write.arff: Writes data to ARFF

Description

Exports data into ARFF format. This format is used by Weka Data Mining software http://www.cs.waikato.ac.nz/ml/weka/.

Usage

write.arff(x, file = "", target = NA, chunk.size=100000)

Arguments

x

data frame with data

file

exported filename

target

sets target attribute in ARFF format. Default value is NA what refers to the last column.

chunk.size

it defines size of chunk (number of cells) that are processed and exported. The bigger the value, the function is faster for small data and slower for big data.

Examples

# Load rmcfs library.
  library(rmcfs)
  
  # Load alizadeh dataset.
  data(alizadeh)
  d <- alizadeh
  
  #Fix input data to be consistent with ARFF and ADX formats. 
  #It is not necessary but for some data can help to export in proper format.
  d <- fix.data(d)
  write.arff(d, file = paste0(tempdir(), "/alizadeh.arff"), target = "class")