How to know which items are in which cluster?

[pranny]

I have a large data set containing urls and some values for each of the urls. Upon clustering, I can see a bunch of clusters along with the data_items, but is there a way to retrieve the original url for a given set of values?

Currently, i have to reverse lookup in the original data structure, and it is not efficient as multiple urls have exact same set of values.

[danbernier]

I was just wondering this same thing. In a toy example, I was able to hack around it by monkey-patching an identifier onto each item, but that's clearly not a great option.

[danbernier]

I think issue #24 represents the same problem:

Is there any way to get the user_ids for each group without looping through and using eval([10,3,0,22]) to find that its in group 1?

Is that what a "class value" is for? Data sets have the last element as the "class value"..

I wasn't able to figure out what "class value" or class_value are, or how to get them out of my data items.