# sequence_recommendation

**Repository Path**: HenryHZY/sequence_recommendation

## Basic Information

- **Project Name**: sequence_recommendation
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-03-02
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Alogorithms for sequence recommendation
## Algorithms
[*] PopRec: A baseline for sequence recommendation that alway recommend user with item having the most popularity(most associated interactions).
[ ] BPR-MF: Top-N recommendation with matrix factorization but optimized by BPR loss.
## Metrics
* HR@k(hit ratio)
$HR@k = \frac_{1}{N}\sum_{u\in N_u}{I(R_{u,g_u} \lt k)}$
* MRR@k(mean reciprocal rank)
$MRR = \frac_{1}{N}\sum_{u\in N_u}{\frac_{1}{R_{u,g_u}}}$
* NDCG@k
The formula is quite complex.