how to see the vocabulary when using bagOfFeatures

Hi, I am using bagoffeatures in matlab. the example is already there http://www.mathworks.com/help/vision/examples/image-category-classification-using-bag-of-features.html

after the library has been built using bag = bagOfFeatures(imgSet)... Question, how can I see the individual elements of library ? i.e words which make up the trained library from the training images ? I was expecting something like bag.Vocabulary ?

[J]

also interested in this answer...

[Saul Covarrubias]

As was I, interested that is, a quick poking around in matlab's source code for bagOfFeatures reveals you can access the vocabulary by calling

bag.saveobj.Vocabulary

supposing you already have a bagOfFeatures object called bag.