The recommendations tag has no wiki summary.
3
votes
1answer
139 views
Item set similarity for real-time calculation purposes?
I am working on a real-time recommendation engine. At one step, I have a feature that resembles a string-encoded item set, so I took Jaccard on the tokenized string to get a good similarity result. ...
2
votes
1answer
109 views
The biggest difference between medical statistics and biological statistics
I am turning my work from medical statistics into biology statistics (fishery). I am wondering if there is a big differences in methodology or focus between these two fields? In medical field, we do a ...
2
votes
0answers
49 views
Collaborative filtering through matrix factorization with logistic loss function
Consider collaborative filtering problem. We have matrix $M$ of size #users * #items. $M_{i,j} = 1$ if user i likes item j, $M_{i,j} = 0$ if user i dislikes item j and $M_{i,j}=?$ if there is no data ...
1
vote
1answer
151 views
Inaccurate R prediction
After development of recommendation engine with the R, before removal of outliers from data-set value of residual standard error was 1351 and after removal of outlier its 656. Still there is no ...
1
vote
1answer
73 views
Book Recommendation for Mathematical Statistics [duplicate]
Hi I am first year undergrad with math background, next year I will be starting a course in introductory mathematical statistics at the University of Toronto,
and the textbook the university uses, ...
1
vote
0answers
93 views
Evaluation methods for personalized recommendation
I am currently trying to verify and evaluate a personalized recommender system I am working on, which seems like a huge task. Evaluating a static recommender system is rather easy and can be done with ...
1
vote
0answers
118 views
Nearest neighbor information for recommendation engines
My friend and I are working on a project on distributed datastructures. We were wondering how much is nearest neighbor information used in modern recommendation systems and whether it would be ...
0
votes
1answer
109 views
Counting how many times a package has been loaded in R? [closed]
Following this question, I wish to have some way of counting how many times I am using a package in my daily work.
Is there a function/package to do that?
In case there isn't, how would you ...
0
votes
1answer
17 views
Calculating user preferences based on purchases: How to incorporate different variables for comparison
I am trying to come up with a metric to calculate user preference correlation for my final project (a web-shop for shoes) at school. Originally I intended to include user ratings and use Pearson's ...
0
votes
0answers
25 views
SVD in movie recommendation
So assuming that there are a 5 X 6 matrix that records a rating for six users for 5 movies. I have computed SVD. However, suppose I add another movie so now it becomes 6 X 6 matrix. But I only have a ...
0
votes
0answers
176 views
Dataset for article recommendation with demographic data
I am experimenting with a recommendation systems for articles (news, magazines etc). Is there any dataset available for the same which includes the demographic information of users as well?
I am ...
0
votes
0answers
179 views
Are there any tagging dataset for evaluating a recommender system? e.g. user--tag--item--date [closed]
I need datasets that has at 4 data elements (user, tag, item, date) to test my recommender system, in which date is when the user add one or many tags to the item. The user and item can be provided as ...
-1
votes
1answer
548 views
How to learn Data Analysis? [closed]
I completed the ml-class offered by Prof Andrew Ng last fall
I started trying one of the problems in Kaggle
When I fit a logistic Regression, the algorithm gave me poor results.
I saw that people do ...
