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Bug 316149

Summary:	would like to be able to specify an acceptable tolerance for numeric differences
Product:	[Eclipse Project] Platform	Reporter:	David L. Paterline <paterldl>
Component:	Compare	Assignee:	Platform-Compare-Inbox <platform-compare-inbox>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	enhancement
Priority:	P3
Version:	3.4.1
Target Milestone:	---
Hardware:	All
OS:	All
Whiteboard:

Description David L. Paterline

2010-06-08 10:56:21 EDT

Build Identifier: M20080911-1700

As I am doing a lot of scientific computing, I am using the compare tool for data files, some of which can be very large. To minimize the differences, I would like to be able to specify a tolerance within which a numerical difference would be ignored (or simply highlighted, rather than being called out as a difference). For example, ignore or highlight any numerical differences within 0.01% of the base value.

Reproducible: Always

Steps to Reproduce:
1. Compare any two nearly-identical data files with numerical differences.

Comment 1 Tomasz Zarna

2010-06-15 07:05:35 EDT

To achieve that you will need to create your own token comparator by implementing the ITokenComparator interface. We do not plan to add such feature in Eclipse, so I guess you will also need to implement a content viewer for the data you're comparing. You can find more information on how to start here : http://help.eclipse.org/galileo/topic/org.eclipse.platform.doc.isv/guide/compare_contentviewer.htm