Code Snippets modified by George Giannakopoulos

George Giannakopoulos — Tue, 25 Aug 2015 12:01:41 -0000

--- v1
+++ v2
@@ -1,17 +1,93 @@
 **Overview**
 The main tasks one usually needs to perform using n-gram graphs are:
 * Create an n-gram graph from a string
+* Output a graph as a [DOT](http://www.graphviz.org/doc/info/lang.html) string
 * Create an n-gram graph from a file
 * Compare two graphs, extracting their similarity
 * Merge two (or more) graphs
-* Output a graph as a [DOT](http://www.graphviz.org/doc/info/lang.html) file
 * Save and load a graph

 We will provide samples in the following sections, tackling the above problems. 

-**Create an n-gram graph**
+**Create an n-gram graph from a string**
+
 ~~~~~~
-String sTmp = "Hello graph!"; // The string we want to represent
-DocumentNGramGraph dngGraph = new DocumentNGramGraph(); // The default document n-gram graph, with min n-gram size and max n-gram size set to 3, and the dist parameter set to 3.
-dngGraph.setDataString(sTmp); // Create the graph
+:::java
+...
+import gr.demokritos.iit.jinsect.documentModel.representations.DocumentNGramGraph;
+
+...
+ // The string we want to represent
+ String sTmp = "Hello graph!";
+ 
+ // The default document n-gram graph, with min n-gram size and max n-gram size set to 3, and the dist parameter set to 3.
+DocumentNGramGraph dngGraph = new DocumentNGramGraph(); 
+
+// Create the graph
+dngGraph.setDataString(sTmp); 
 ~~~~~~
+
+**Output a graph as a [DOT](http://www.graphviz.org/doc/info/lang.html) string**
+
+~~~~~~
+:::java
+        /* The following command gets the first n-gram graph level (with the minimum n-gram
+        size) and renders it, using the utils package, as a DOT string */
+        System.out.println(utils.graphToDot(dngGraph.getGraphLevel(0), true));
+~~~~~~
+
+**Create an n-gram graph from a file**
+
+~~~~~~
+:::java
+...
+import gr.demokritos.iit.jinsect.documentModel.comparators.NGramCachedGraphComparator;
+import gr.demokritos.iit.jinsect.documentModel.representations.DocumentNGramGraph;
+import gr.demokritos.iit.jinsect.structs.GraphSimilarity;
+import gr.demokritos.iit.jinsect.utils;
+import java.io.IOException;
+...
+        // The filename of the file the contents of which will form the graph
+        String sFilename = "file.txt";
+        DocumentNGramGraph dngGraph = new DocumentNGramGraph(); 
+        // Load the data string from the file, also dealing with exceptions
+        try {
+            dngGraph.loadDataStringFromFile(sFilename);
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+~~~~~~
+
+**Compare two graphs, extracting their similarity**
+
+~~~~~~
+:::java
+...
+import gr.demokritos.iit.jinsect.documentModel.comparators.NGramCachedGraphComparator;
+import gr.demokritos.iit.jinsect.documentModel.representations.DocumentNGramGraph;
+import gr.demokritos.iit.jinsect.structs.GraphSimilarity;
+import gr.demokritos.iit.jinsect.utils;
+import java.io.IOException;
+...
+
+        String sTmp = "Hello graph!";
+        DocumentNGramGraph dngGraph = new DocumentNGramGraph(); 
+        dngGraph.setDataString(sTmp);
+        String sTmp2 = "Hello other graph!";
+        DocumentNGramGraph dngGraph2 = new DocumentNGramGraph(); 
+        dngGraph2.setDataString(sTmp2);
+         // Create a comparator object
+         NGramCachedGraphComparator ngc = new NGramCachedGraphComparator();
+         // Extract similarity
+         GraphSimilarity gs = ngc.getSimilarityBetween(dngGraph, dngGraph2);
+         // Output similarity (all three components: containment, value and size)
+         System.out.println(gs.toString());
+
+~~~~~~
+
+**Merge two graphs**
+Will be added soon (I hope).
+
+
+**Save and load a graph**
+Same as above.

Code Snippets modified by George Giannakopoulos

George Giannakopoulos — Tue, 25 Aug 2015 11:11:56 -0000

Overview
The main tasks one usually needs to perform using n-gram graphs are:
Create an n-gram graph from a string
Create an n-gram graph from a file
Compare two graphs, extracting their similarity
Merge two (or more) graphs
Output a graph as a DOT file
Save and load a graph

We will provide samples in the following sections, tackling the above problems.

Create an n-gram graph
String sTmp = "Hello graph!"; // The string we want to represent
DocumentNGramGraph dngGraph = new DocumentNGramGraph(); // The default document n-gram graph, with min n-gram size and max n-gram size set to 3, and the dist parameter set to 3.
dngGraph.setDataString(sTmp); // Create the graph

Recent changes to Code Snippets

Code Snippets modified by George Giannakopoulos

Code Snippets modified by George Giannakopoulos