[PIG-277] UDF for computing correlation and covariance between data sets

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.1.0
• Patch Info: Patch Available
• Assignee: Ajay Garg
• Reporter: Ajay Garg
• Created: 23/Jun/08 06:48
• Updated: 24/Mar/10 22:01
• Resolved: 01/Jul/08 16:01

Description

UDFs for computing correlation and covariance between data sets. Use following commands to compute covariance
A = load 'input.xml' using PigStorage(':');
B = group A all;
define c COV('a','b','c');
D = foreach B generate group,c(A.$0,A.$1,A.$2);