added some descriptions

josephwilk · Apr 24, 2011 · dfe33b1 · dfe33b1
1 parent e40ee1a
commit dfe33b1
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/TODO.txt b/TODO.txt
@@ -1,8 +1,11 @@
 == FEATURES/PROBLEMS:
 
 * Applying transforms to query vectors
-* Detect the optimal dimension reduction in LSA. => run a benchmark
+* Allow objects to be passed in as transforms.
-* Allow objects to be passed in as transforms. => hashes
+  * Hashes might be enough, but a faster data structure might be a good option.
+* Detect the optimal dimension reduction in LSA.
+  * This needs some benchmark. Low number of dimensions can be effective enough.
+  * http://nlp.stanford.edu/IR-book/html/htmledition/latent-semantic-indexing-1.html
 * Implement Probabilistic latent semantic analysis
 * Implement Latent Dirichlet Allocation