Takuya Kitazawa

Results 18 comments of Takuya Kitazawa

That is, implement onehot encoding for categorical attributes.

Idea: If `k` is set to zero, run model selection automatically.

Current default values: - r = 0.02 - T1 = 10 - T2 = 5 - k = (use the result of model selection)

```jl using Pkg Pkg.add("IJulia") ``` ``` $ jupyter notebook ```

https://dl.acm.org/doi/10.1145/2168752.2168771 > LIBFM also contains methods for optimizing an FM model with respect to ranking [Liu and Yang 2008] based on pairwise classification [Rendle et al. 2009] https://github.com/srendle/libfm/blob/30b9c799c41d043f31565cbf827bf41d0dc3e2ab/src/fm_core/fm_sgd.h#L53

Tool https://github.com/JuliaCI/BenchmarkTools.jl

### Synthetic r=0.02, k=6, T1=10, T2=5 ![synthetic](https://cloud.githubusercontent.com/assets/853567/18236175/a166b254-735e-11e6-8879-9d36ea4ca43b.png) ### Twitter r=0.03, k=6, T1=10, T2=5 ![twitter](https://cloud.githubusercontent.com/assets/853567/18236183/a713d876-735e-11e6-8c7d-0f9447e3d6a7.png)

### Datadog aggregated data points of a sample metric - r=0.03, k=6, T1=10, T2=5 for **LogLoss** - r=0.09 for **Hellinger** ![dd](https://cloud.githubusercontent.com/assets/853567/18237807/d4ee7e10-7370-11e6-8ecc-43c2c9a8b34f.png)

One important requirement is that an algorithm has to work well on high-dimensional data points as: ``` [metric 1, metric 2, metric 3, ...., metric N] ``` This enable us...

Implemented Singular Spectrum Transformation (SST) based change-point detector: [sst.py](https://github.com/takuti/datadog-anomaly-detector/blob/87f313138bef7add43ce3cac512375d692b151db/core/sst/sst.py) - http://ide-research.net/papers/2005_SDM_Ide.pdf Some experimental results: ### Synthetic data ![synthetic_sst](https://cloud.githubusercontent.com/assets/853567/18342168/607886d2-75e8-11e6-8fd7-10c4d409835f.png) ### Twitter data ![twitter_sst_1](https://cloud.githubusercontent.com/assets/853567/18342172/69774b38-75e8-11e6-9ab0-b576257a94d2.png) ^ larger `r` ![twitter_sst_2](https://cloud.githubusercontent.com/assets/853567/18342175/6d15cf80-75e8-11e6-8fcd-aba64a4a949b.png) ^ smaller `r` `w`...