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java.lang.Objectorg.apache.mahout.df.data.DataLoader
public class DataLoader
Converts the input data to a Vector Array using the information given by the Dataset.
Generates for each line a Vector that contains :
Method Summary | |
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protected static Data |
constructData(Dataset.Attribute[] attrs,
java.util.List<Instance> vectors,
java.util.List<java.lang.String>[] values)
constructs the data |
static Dataset |
generateDataset(java.lang.String descriptor,
org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.fs.Path path)
Generates the Dataset by parsing the entire data |
static Dataset |
generateDataset(java.lang.String descriptor,
java.lang.String[] data)
Generates the Dataset by parsing the entire data |
static Data |
loadData(Dataset dataset,
org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.fs.Path fpath)
Loads the data from a file |
static Data |
loadData(Dataset dataset,
java.lang.String[] data)
Loads the data from a String array |
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 Data loadData(Dataset dataset, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path fpath) throws java.io.IOException
dataset
- fs
- file systemfpath
- data file path
java.io.IOException
- if any problem is encounteredpublic static Data loadData(Dataset dataset, java.lang.String[] data)
public static Dataset generateDataset(java.lang.String descriptor, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path) throws DescriptorException, java.io.IOException
descriptor
- attributes descriptionfs
- file systempath
- data path
DescriptorException
java.io.IOException
public static Dataset generateDataset(java.lang.String descriptor, java.lang.String[] data) throws DescriptorException
descriptor
- attributes descriptiondata
-
DescriptorException
protected static Data constructData(Dataset.Attribute[] attrs, java.util.List<Instance> vectors, java.util.List<java.lang.String>[] values)
attrs
- attributes descriptionvectors
- data elementsvalues
- used to convert CATEGORICAL attributes to Integer
java.lang.RuntimeException
- if no LABEL is found in the attributes description
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