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java.lang.Objectorg.apache.mahout.math.hadoop.stochasticsvd.SSVDHelper
public final class SSVDHelper
set of small file manipulation helpers.
Method Summary | |
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static Iterator<Pair<org.apache.hadoop.io.Writable,Vector>> |
drmIterator(org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.fs.Path glob,
org.apache.hadoop.conf.Configuration conf,
Deque<Closeable> closeables)
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static DenseMatrix |
drmLoadAsDense(org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.fs.Path glob,
org.apache.hadoop.conf.Configuration conf)
helper capabiltiy to load distributed row matrices into dense matrix (to support tests mainly). |
static double[][] |
extractRawData(Matrix m)
extracts row-wise raw data from a Mahout matrix for 3rd party solvers. |
static DenseSymmetricMatrix |
loadAndSumUpperTriangularMatricesAsSymmetric(org.apache.hadoop.fs.Path glob,
org.apache.hadoop.conf.Configuration conf)
Load multiple upper triangular matrices and sum them up. |
static Vector |
loadAndSumUpVectors(org.apache.hadoop.fs.Path glob,
org.apache.hadoop.conf.Configuration conf)
|
static UpperTriangular |
loadUpperTriangularMatrix(org.apache.hadoop.fs.Path glob,
org.apache.hadoop.conf.Configuration conf)
Load only one upper triangular matrix and issue error if mroe than one is found. |
static void |
saveVector(Vector v,
org.apache.hadoop.fs.Path vectorFilePath,
org.apache.hadoop.conf.Configuration conf)
save single vector into hdfs file. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static void saveVector(Vector v, org.apache.hadoop.fs.Path vectorFilePath, org.apache.hadoop.conf.Configuration conf) throws IOException
v
- vector to save
IOException
public static Iterator<Pair<org.apache.hadoop.io.Writable,Vector>> drmIterator(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path glob, org.apache.hadoop.conf.Configuration conf, Deque<Closeable> closeables) throws IOException
IOException
public static DenseMatrix drmLoadAsDense(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path glob, org.apache.hadoop.conf.Configuration conf) throws IOException
fs
- filesystemglob
- FS globconf
- configuration
IOException
public static DenseSymmetricMatrix loadAndSumUpperTriangularMatricesAsSymmetric(org.apache.hadoop.fs.Path glob, org.apache.hadoop.conf.Configuration conf) throws IOException
IOException
public static Vector loadAndSumUpVectors(org.apache.hadoop.fs.Path glob, org.apache.hadoop.conf.Configuration conf) throws IOException
IOException
public static UpperTriangular loadUpperTriangularMatrix(org.apache.hadoop.fs.Path glob, org.apache.hadoop.conf.Configuration conf) throws IOException
IOException
public static double[][] extractRawData(Matrix m)
DenseMatrix
at
this point, so we have to resort to abstract element-wise copying.
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