Activity - randomSample

Activity Type: Transformation

Description

Produce a random sample of the input values based on the given fraction.

Example

<randomSample name="rand">
 <inputValues from="dataStoreOutput"/>
       <fraction>0.7</fraction>
 <sampleOutput name="output"/>

<randomSample name="rand">
 <InputValues from="dataStoreOutput"/>
       <fraction>0.7</fraction>
      <seed>10</seed>
 <sampleOutput name="output"/>

Specification

Element randomSample:

• Attribute name - unique name for the activity within the scope of a request.
• Element inputValues (required) - define the input values upon which the random generator will be applied.
• • Attribute from (optional) - name of the output from another activity which provides the value of this parameter.
• Element fraction  - the fraction according to which the random sample will be generated.
• Element seed (optional) - the seed in order the state of the random generator to be hold.
• Element sampleOutput (required) - output stream which produces the random sample.
• • Attribute name - name of this output stream.

Input and Output Types

• Input: inputValues - java.lang.String
• Output: sampleOuput - java.lang.String

Data Resource Accessor

This activity can operate with any data resource accessor.

XML Schema

OGSA-DAI/schema/ogsadai/xsd/activities/random_sample.xsd

Class

uk.org.ogsadai.activity.transform.RandomSampleActivity

Client Toolkit Class

uk.org.ogsadai.client.toolkit.activity.transform.RandomSample