Comments (2)
See http://yifanhu.net/PUB/cf.pdf and equation (4), which is what this is trying to implement. The solver is indeed solving for a variation on this equation, something like Qu*Y = Xu * (Yt * Y)
. The gramian term should be of the whole item matrix.
I admit it's been a long time since I looked at this code and it'd take a while to recall how the whole implementation works, but I think that much is right.
from oryx.
I see your point after looking at the original paper and your equation again. I think right now I understand your logic now, I hope I am right. The equation starts with
Qu*Y = Xu * (Yt * Y)
originally Qu should be the user interaction strength to all items, i.e., Qu is a vector of n rows representing n items. Now the assumption is that an interaction for item i has been updated while others not, that's why the "value" argument in function computeUpdatedXu() is a scalar double. What the code calculates is actually the change of Qu
dQu*Y = dXu * (Yt * Y)
The key is dQu has only one non-zero element dQui corresponds to item i updated by "value" input.
And dQu*Y = dQui * Yi
, so this yields
dQui*Yi = dXu * (Yt * Y)
where in the beginning I felt like the left and right hand side seems not consistent in Y or Yi
Regards,
Tian
from oryx.
Related Issues (20)
- Kafka 0.11.x support HOT 27
- Customer ID update HOT 2
- Multiple jobs on oryx HOT 3
- Update to Tomcat 9 / Jersey 2.26 HOT 1
- Error while runnig Oryx batch HOT 1
- Spark 2.3 and java.lang.NoClassDefFoundError: kafka/admin/RackAwareMode HOT 64
- java.lang.NoClassDefFoundError: scala/collection/Seq HOT 3
- 2.7.0 - Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/streaming/kafka010/LocationStrategies HOT 1
- mvn install error HOT 1
- SpeedLayer read kafka offset HOT 1
- KryoException: Buffer overflow. Available: 1, required: 4 HOT 19
- Trouble handling huge data HOT 3
- Reseting model HOT 3
- java.lang.ClassCastException: java.lang.Object cannot be cast to java.lang.String HOT 22
- /knownItems/uid doesn't return all items HOT 50
- Can't build oryx 8.0 HOT 8
- Recommend products FROM <IDs> HOT 1
- Oryx tutorial HOT 2
- Application is added to the scheduler and is not yet activated. HOT 2
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from oryx.