Jodie Heqi QiuSQL: The key thing to understandI found that the order SQL processes commands is crucial to understanding SQL, especially for beginners.Oct 30, 2020Oct 30, 2020
Jodie Heqi QiuMy Understandings of PCAPlease note this is not a comprehensive article of PCA. I’m just sharing some key thoughts on PCA that might be helpful to others who are…Apr 19, 2020Apr 19, 2020
Jodie Heqi QiuMy Understandings of Neural Networks: a Mathematical PerspectiveThe first time I learned about neural networks was November 2019 when taking the famous machine learning course by Andrew Ng. I had a…Apr 12, 2020Apr 12, 2020
Jodie Heqi QiuMy Understandings: Why Use Log Scale to Plot Ratio VI would like to mark down the reasons that I found helpful for intuitive understandings.Apr 10, 2020Apr 10, 2020
Jodie Heqi QiuMy Understandings of Degree of FreedomA good example to intuitively understand the concept:Apr 9, 2020Apr 9, 2020
Jodie Heqi QiuMy Understandings of T-Test & T-DistributionI came across t-test when I was doing data analysis of my master thesis, in which I compared follower’s favor levels towards social media…Apr 8, 2020Apr 8, 2020
Jodie Heqi QiuMy understandings of Data pre-processingWhen pre-processing training data and test data, does it make a difference to pre-process before splitting or to split before…Apr 5, 2020Apr 5, 2020
Jodie Heqi QiuMy Understanding: Memos on XgboostI was very confused by Xgboost. After reading the original research paper I have finally come to understand the fundamentals. I also did…Mar 30, 2020Mar 30, 2020
Jodie Heqi QiuInstalling Xgboost on MacOSI’ve tried many ways to pip install but kept running into the following error:Mar 21, 2020Mar 21, 2020
Jodie Heqi QiuCoursera Machine Learning: Unzipping Problem&FixIn week 2, after I downloaded the exercise zip file “machine-learning-ex”, I found that I could not unzip it in Mathlab online.Dec 18, 2019Dec 18, 2019
