randomtable.c

来自「vc的源代码程序的基于最小特征向量的元素的集合方法的程序源代码」· C语言 代码 · 共 49 行

#include "randomTable.h"

RandomDataTable::RandomDataTable(DataTable &trainingTable,
									char *fname, int n)
{
	int Nrows = trainingTable.numOfRows();

	randomShuffle(trainingTable, Nrows);

	if(fname==NULL) {
		printf("Please enter the output filename:");
		fname = new char[1000];
		scanf("%s", fname);
  }
	fptr = fopen(fname, "w+");
	ERROR2(fptr, "RandomDataTable: File %s cannot be opened\n", fname);

	trainingTable.printDataTableToOutStream(fptr);

	fclose(fptr);
}

void RandomDataTable::randomShuffle(DataTable &trainingTable, int N)
{
	srand48( (unsigned)time( NULL ) );
	int j,k ;
	for(int i=0; i<N; i++)
	{
		j = (int)(drand48()*N);
		k = (int)(drand48()*N);

		trainingTable.Swap(k,j);
	}
}

void main(char argc, char **argv)
{
	if(!(argc==3||argc==2)) { printf("randomShuffle [input file name] ");
		printf("[output file name]");
		exit(1);
	}
	Source src(",", argv[1]);

	DataTable tbl(src);

	RandomDataTable rdtbl(tbl, argv[2] );

}