turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

Find a Community

- Home
- /
- Analytics
- /
- Text Analytics
- /
- Re: Text Topics

Topic Options

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-19-2017 02:35 PM

Hello,

i am using Text Topics node and there is no property for the algorithm that will be used to make the clustering.

Does anybody know if there is any default algorithm?

In Text Miner Help, it only says that the input is term weight.

Highlighted
## Re: Text Topics

Options

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Posted in reply to charismast0

11-27-2017 08:44 AM

The algorithm for text topic discovery is based on the SVD. One of the factors of the SVD gives a numTerm by K(number of topics) matrix of weights or loadings. That matrix is rotated to increase the separation between large and small term weights in each of those vectors. Terms with a larger weight in each of the K vectors "define" the topic and these vectors can be multiplied with any given document vector to produce document scores for its membership in each topic.