Recent Posts

• December 23, 2015

  Linsanity

  Last Saturday night I watched a documentary film called linsanity starred Jeremy Lin who is the model Asian American NBA player.There are too many articles analyzing linsanity phenomenon and I don’t think I’m the right person to talk much about so...

• December 07, 2015

  Learning from Imbalanced Data

  I once gave a short talk during lab’s Machine Learning seminar regarding classification algorithms in imbalanced data. Technically speaking, any data set that exhibits an unequal distribution between its classes can be considered imbalanced.(He H,...

• December 04, 2015

  DREAM Big Data Challenge

  Last summer I and my colleagues in Ontario Institute for Cancer Research teamed up together as Chipmunks, participated in one of DREAM big data challenges: Acute Myeloid Leukemia Outcome Prediction Challenge (AML). Similar to Kaggle, we were asked...

• December 01, 2015

  Adaptive Thresholding

  Motivated by applications in a wide range of fields in signal processing, social science, finance, genetics etc, statistical inference in high dimensional data is a problem of greatinterest. Covariance matrix plays an important role in many fundam...

• November 30, 2015

  SAS tricks: Assign the Same Value within Group

  We often use NODUPKEY or NODUP with BY statement to filter out duplicates in terms of specified variables in BY. However, the problem I dealt with today seemed to be a bit tricky. And I surprisingly found out how powerful RETAIN statement is! Let ...