Changes to Nearest Neighbor object to support loading instances from a file.

nearest_neighbor_v5.scala

object NearestNeighbor {
	def create( libraryFileName: String): NearestNeighbor = {
		val instances = getInstancesFromFile( libraryFileName)
		val library = createLibraryFromCSVs( instances)
		new NearestNeighbor( library)
	}
	
	def getInstancesFromFile( libraryFileName: String): List[ String] = {
		Source.fromFile( new File( libraryFileName)).getLines().toList		
	}
	
	def createLibraryFromCSVs( instances: List[ String]): List[Instance] = {
		instances.map( Instance.parseString( _))
	}
	
	def main( args: Array[ String]) {
		val nearestNeighbor = NearestNeighbor.create( "library.data")
		val query = new Instance( List( 0.0, 0.0, 0.0, 0.0))
		val classifiedQuery = nearestNeighbor.classify( query)
		println( classifiedQuery)
	}
}