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: Sentiment Analysis-Probability of sentiment

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

11-02-2017 02:08 AM

Hello everyone, i have studied sas sentiment analysis studio tutorials and i cannot understand the ratio by which the probability of text is being derived.

Highlighted
## Re: Sentiment Analysis-Probability of sentiment

Options

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

Posted in reply to charismast0

11-08-2017 04:11 PM

The algorithm of probability can be found in the User's Guide for SAS Sentiment Analysis. Here is what the documentation states for the calculation of the probability:

for each positive rule match:

overall_sentiment = overall_sentiment + (weight of the rule * common weighting factor for positive rules)

for each negative rule match:

overall_sentiment = overall_sentiment – (weight of the rule)

overall_sentiment_probability =1/(1+e((0-overall_sentiment)*log(1.5)))