Difference between revisions of "Approximate search"
m |
|||
| Line 23: | Line 23: | ||
== Configuring the threshold == | == Configuring the threshold == | ||
| − | Matching is done based on ''edit distance'' ([http://en.wikipedia.org/wiki/Damerau%E2%80%93Levenshtein_distance Damerau-Levenshtein algorithm]), | + | Matching is done based on ''edit distance'' ([http://en.wikipedia.org/wiki/Damerau%E2%80%93Levenshtein_distance Damerau-Levenshtein algorithm]), i.e. a match beween search term ''x'' and content ''y'' is considered a hit (true positive) if |
<!--:<math>\frac{|x|-dist(x,y)}{|x|} > \mathrm{minProb}</math>--> | <!--:<math>\frac{|x|-dist(x,y)}{|x|} > \mathrm{minProb}</math>--> | ||
(|x| - dist(x,y))/|x| > minProb. | (|x| - dist(x,y))/|x| > minProb. | ||
| Line 31: | Line 31: | ||
== Feedback == | == Feedback == | ||
| − | Please edit this section (if you have the privileges) or write a mail to fnatter@gmx.net, | + | Please edit this section (if you have the privileges) or write a mail to [fnatter@gmx.net], |
your feedback is very much appreciated! | your feedback is very much appreciated! | ||
Revision as of 14:04, 26 February 2012
Contents
Approximate Search in Freeplane
Starting with 1.2.x, Freeplane includes an 'approximate Search' feature which allows to find content (nodes, notes, or whatever) that do not exactly match the search term, but allow some changes ("distance") between the search term and the content.
How to run (approximate) Search
Press Ctrl-F or select View->Toolbars->Filter toolbar to show the "filter/search" toolbar and enable Approximate searching by enabling the "Approximate" checkbox in the filter toolbar (Alt+A). Then you can enter a search term in the search box () and press Enter or click the "Find next" Button (icon with a blue right arrow in the filter toolbar) to start the search. If you want to check for equality (search term equals content as opposed to is contained in content), then you should change the default "Contains" in the search type combobox to "Is equal to". You can define more complex search rules by using the Filter->Compose filter dialog.
Search results
Once you activate Approximate matching, all matching using the filter tool is done approximately, i.e.
- you can search for "file" and it will find "flie" (typo)
- you can search for "hobbies" and it will find "hobbys"
- if you use Freeplane for program source code: you can search for "NumberFormat" and it will find "aNumber_Format"
- "network" = "netzwerk"
- ...
Configuring the threshold
Matching is done based on edit distance (Damerau-Levenshtein algorithm), i.e. a match beween search term x and content y is considered a hit (true positive) if (|x| - dist(x,y))/|x| > minProb. The Threshold for approximate matching minprob can be customized in the Tools->Preferences dialog, tab Behavior, section Search. The lower the value, the more variations of the search term will be found. minProb=0.15 will find almost anything, while minProb=1.0 will do exact string matching.
Feedback
Please edit this section (if you have the privileges) or write a mail to [fnatter@gmx.net], your feedback is very much appreciated!
