ROC Curve: my interpretation

February 26, 2018 6 minute read

Python: How to pip-install packages in virtualenv

February 21, 2018 1 minute read

My aim is to install ALL packages I need for a project to a non-default location.

scikit-learn: init your estimator lightly and fit heavily

February 2, 2018 1 minute read

If you run cross_validate(n_jobs > 1) with your own estimator, pay attention that your estimator will be copied per job.

scipy: pdist indexing

January 31, 2018 1 minute read

scipy.spatial.distance.pdist(X) gives the pair-wise distances of X, $\mathrm{dist}(X[i],X[i])$ not included. The distances are stored in a dense matri...

scikit-learn: A walk through of GroupKFold.split()

January 25, 2018 2 minute read

Suppose $X[\text{“groups”}]=\left[\begin{array}{c}a\\ b\\ b\\ c\\ c\\ c\end{array}\right]$ and n_splits=3.

Pandas: split a DataFrame into chunks

January 23, 2018 1 minute read

Prepare a test dataset:

Check the header of Columbia Eigen tab delimited files

January 23, 2018 1 minute read

Precomputed Eigen scores are available at Download Eigen/Eigen-PC scores.

R: Graphics Tricks

December 24, 2017 less than 1 minute read

总结自 R Graphics Cookbook

SQL: Autocommit does not guarantee immediate committing

November 8, 2017 1 minute read

If you just google, you may find autocommit a vaguely defined term.

Python: pprint.pformat can be a good friend of str

November 8, 2017 less than 1 minute read

```python import pprint