本文整理匯總了Java中org.apache.hadoop.fs.FSDataInputStream.readDouble方法的典型用法代碼示例。如果您正苦於以下問題：Java FSDataInputStream.readDouble方法的具體用法？Java FSDataInputStream.readDouble怎麽用？Java FSDataInputStream.readDouble使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.fs.FSDataInputStream的用法示例。
在下文中一共展示了FSDataInputStream.readDouble方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: loadDenseDoublePartition
import org.apache.hadoop.fs.FSDataInputStream; //導入方法依賴的package包/類
private static void loadDenseDoublePartition(DenseDoubleModel model, FSDataInputStream input,
ModelPartitionMeta partMeta) throws IOException {
int rowNum = input.readInt();
int startCol = (int) partMeta.getStartCol();
int endCol = (int) partMeta.getEndCol();
int rowId = 0;
double[] row = null;
for (int i = 0; i < rowNum; i++) {
rowId = input.readInt();
row = model.getRow(rowId);
for (int j = startCol; j < endCol; j++) {
row[j] = input.readDouble();
}
}
}
示例2: loadDenseDoubleRowFromPartition
import org.apache.hadoop.fs.FSDataInputStream; //導入方法依賴的package包/類
public static double[] loadDenseDoubleRowFromPartition(FSDataInputStream input,
ModelPartitionMeta partMeta, int rowId)
throws IOException {
RowOffset rowOffset = partMeta.getRowMetas().get(rowId);
input.seek(rowOffset.getOffset());
Preconditions.checkState (input.readInt() == rowId);
int num = (int) (partMeta.getEndCol() - partMeta.getStartCol());
double[] row = new double[num];
for (int i = 0; i < num; i++) {
row[i] = input.readDouble();
}
return row;
}
示例3: reduce
import org.apache.hadoop.fs.FSDataInputStream; //導入方法依賴的package包/類
@Override
protected void reduce(LongWritable key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
int k = context.getConfiguration().getInt("k", -1);
String fpath = context.getConfiguration().get("mpath");
String datLoc = context.getConfiguration().get("datLoc", "od");
String wd = context.getConfiguration().get(datLoc);
Path file = new Path(wd, fpath);
FileSystem fs = file.getFileSystem(new Configuration());
FSDataInputStream ds = fs.open(file);
long start = (key.get() - 1) * 8 * (k + 1);
ds.seek(start + 8);
double[] wi = new double[k];
for (int counter = 0; counter < k; counter++) {
wi[counter] = ds.readDouble();
}
ds.close();
for (Text value : values) {
String[] keyVal = value.toString().split("\\t");
long j = Long.parseLong(keyVal[0]);
double aij = Double.parseDouble(keyVal[1]);
StringBuilder result = new StringBuilder();
for (int cou = 0; cou < k; cou++) {
result.append(aij * wi[cou]);
if (cou < k) {
result.append(",");
}
}
context.write(new LongWritable(j), new Text(result.toString()));
}
}