CollaborativeFiltering | simple c implementation of collaborative | Recommender System library
kandi X-RAY | CollaborativeFiltering Summary
kandi X-RAY | CollaborativeFiltering Summary
simple c++ implementation of collaborative filtering.
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QUESTION
I am using Pycharm and I created the project in a folder called collaborative filtering. I have some csv in a folder called ml-latest-small that I also placed in the collaborative filtering folder that has the .py file I am working from.
I am getting the following errors:
...ANSWER
Answered 2018-Apr-21 at 19:32Here, the ~
means $HOME
(read here):
which is why you end up with:
/Users//Users/usernamehere/Desktop/Machine Learning/Lesson 5/ratings.csv'
which is not a valid path.
QUESTION
Our Android project uses Firebase Database, and we want to use Firebase Cloud Functions for generating a recommendation for the user. For this, we decided to use npm likely module. Here is my function in index.js:
...ANSWER
Answered 2018-Apr-01 at 17:01For database triggers must return a promise that resolves when all the asynchronous work in the function is complete. once() is async and does not block the function, so it returns immediately before the data is available to the callback. You should be using the promise returned from once() (and not the callback function parameter) to respond when the data is available.
If you don't return a promise that resolves when all the work is complete, Cloud Functions may clean up your function stop all of its work before it's complete.
QUESTION
I have 9 nodes cluster and each node has the following configurations,
I’m trying to generate recommendations for all the users in MatrixFactorizationModel using 'recommendProductsForUsers' function. Looks like it takes very long time to complete (eg: For 1 month of data it takes approximately around 34 hours). Is it due to the iteration for multiple times over the matrix?
How can I reduce the execution time?
These are my spark-submit configuration:
spark-submit --jars $JAR_LOC --class com.collaborativefiltering.CustomerCollaborativeJob --driver-memory 5G --num-executors 7 --executor-cores 2 --executor-memory 20G --master yarn-client cust_rec/cust-rec.jar --period 1month --out /PATH --rank 50 --numIterations 2 --lambda 0.25 --alpha 300 --topK 20
Thank you very much in advance.
...ANSWER
Answered 2017-Apr-21 at 00:10I found in MatrixFactorizationModel the recommendProductsForUsers runs through multiple iteration so the computational time is high. Once I started to run my jobs in cloud, I tested the job by increasing the nodes and spark-executors. It actually worked! I was able to run and complete the job within 4 hours.
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