Publications by Zhi Ying Chen (Sec#1), Mengqin Cai (Sec#3), Fan Xu (Sec#4), Sin Ying Wong (Sec#4)
Data 605 - Assignment 7
Code Show All Hide All Data 605 HW7: Imp. Distributions, EX, VARX 1 Problem Set 1 (Sec5.1 Ex6) 1.1 PS1 Answer 2 Problem Set 2 2.1 PS2 Answer 2.1.1 a. Geometric 2.1.2 b. Exponential 2.1.3 c. Binomial 2.1.4 d. Poisson Sin Ying Wong 10/10/2020 Please refer to the Assignment 7 Document. library(tidyr) library(dplyr) library(gtools) 1 Pr...
3900 sym R (680 sym/28 pcs)
Data 605 - Assignment 6
Code Show All Hide All Data 605 HW6: Combinatorics, Conditional Probability 1 Problem Set 1 1.1 PS1 Answer 2 Problem Set 2 2.1 PS2 Answer 3 Problem Set 3 3.1 PS3 Answer 4 Problem Set 4 4.1 PS4 Answer 5 Problem Set 5 5.1 PS5 Answer 6 Problem Set 6 6.1 PS6 Answer 7 Problem Set 7 7.1 PS7 Answer 8 Problem Set 8 8.1 PS8 Answer 9 Problem Se...
9999 sym R (1521 sym/36 pcs)
Data 605 - Assignment 3
Code Show All Hide All Data 605 HW3: Eigenvalues, Eigenvectors 1 Problem Set 1 1.1 Part(1) 1.2 Part(2) 1.3 Part(3) 2 Problem Set 2 2.1 Characteristic Polynomial 2.2 Eigenvalues & Algebraic Multiplicities 2.3 Eigenvectors & Geometric Multiplicities 2.3.1 lambda = 1 2.3.2 lambda = 4 2.3.3 lambda = 6 Sin Ying Wong 09/10/2020 Please refer to...
9259 sym R (1557 sym/25 pcs)
Data 605 - Assignment 4
Code Show All Hide All Data 605 HW4: Linear Transformations, Representations 1 Problem Set 1 1.1 X and Y 1.2 SVD of A 1.3 Examine X & Y with A 1.3.1 U vs X 1.3.2 V vs Y 1.3.3 Singular Values vs Eigenvalues 2 Problem Set 2 2.1 General Ideas 2.2 Create the function 2.3 Test the function 2.3.1 A Number 2.3.2 1x1 matrix 2.3.3 2x2 matrix 2.3.4 2x...
8884 sym R (12263 sym/176 pcs)
Data 605 - Assignment 5
Code Show All Hide All Data 605 HW5: Probability Distribution 1 Problem Set 1 1.1 General Ideas 1.2 Proof 1.3 Solve (a) 1.4 Solve (b) 1.5 Solve (c) 1.6 Solve (d) 1.7 Solve (e) Sin Ying Wong 09/24/2020 Please refer to the Assignment 5 Document. library(tidyr) library(dplyr) 1 Problem Set 1 Choose independently two numbers B and C at rand...
5500 sym R (1988 sym/12 pcs) 6 img
Data 622 - HW1
Code Show All Hide All Data 622 HW1: Run the Model 1 Data Exploration 2 Building Models 2.1 Logistic Regression 2.2 Naive Bayes 2.3 kNN 2.3.1 k=3 2.3.2 k=5 3 Performance 3.1 Metrics of Training Data 3.2 Metrics of Testing Data 3.3 Short Summary 4 Conclusion 4.1 Best Ability to Learn 4.2 Best Ability to Generalize 4.3 Future Improvement Si...
4885 sym R (16540 sym/65 pcs) 10 img
Data 605 - Assignment 9
Code Show All Hide All Data 605 HW9: Central Limit Theorem, Generating Functions 1 Problem Set 1 (Sec9.3 Ex11) 1.1 PS1 Answer 1.1.1 Part (a) 1.1.2 Part (b) 1.1.3 Part (c) 2 Problem Set 2 2.1 PS2 Answer 3 Problem Set 3 3.1 PS3 Answer Sin Ying Wong 10/25/2020 Please refer to the Assignment 9 Document. library(tidyr) library(dplyr) libra...
3762 sym R (232 sym/7 pcs)
Data 622 - HW2
Code Show All Hide All Data 622 HW2: Finding the Best Model 1 Load Package 2 Part A 2.1 Step 0 2.1.1 Load Data 2.2 Step 1 2.3 Step 2 2.3.1 Train Test Split 2.3.2 SVM 2.3.3 Decision Tree 2.4 Step 3 2.4.1 SVM w/ 5-fold CV 2.4.2 SVM w/ 10-fold CV 2.4.3 SVM w/ Bootstrap 2.4.4 DT w/ 5-fold CV 2.4.5 DT w/ 10-fold CV 2.4.6 DT w/ Bootstrap 3 Part ...
3537 sym R (15503 sym/37 pcs)
Data 605 - Assignment 14
Code Show All Hide All Data 605 HW14: Taylor Series Approximations 1 Problem Set 2 Taylor Series 3 Answers 3.1 Q1 3.2 Q2 3.3 Q3 Sin Ying Wong 12/06/2020 Please refer to the Assignment 14 Document. 1 Problem Set This week, we’ll work out some Taylor Series expansions of popular functions. \(f(x) = \frac{1}{(1-x)}\) \(f(x) = e^{x}\) \(f...
2175 sym 1 img
Data 605 - Assignment 12
Code Show All Hide All Data 605 HW11: Regression Analysis in R 2 1 Regression Problem 1.1 Import Data 1.2 Q1 1.2.1 Build Model 1.2.2 Evaluate the Model 1.2.3 Regression Assumptions 1.2.3.1 Linearity 1.2.3.2 Normality of Residuals 1.2.3.3 Variability 1.2.3.4 Independence of errors 1.3 Q2 1.3.1 Raise LifExp and TotExp 1.3.2 Build Model 1.3.3 E...
11413 sym R (10695 sym/50 pcs) 17 img