Publications by CHUNJIE NAN
DATA608_Final_Project_ChunjieNan
Project Background In 1979, U.S. and China reestablished diplomatic relations, and signed a bilateral trade agreement(Nagashybayeva 2019). China is one of the largest partners of the U.S. , followed by Mexico and Canada. In July 2018, the former U.S. president Trump placed tariff on around $550 billion of imports from China that including cars, h...
7872 sym R (19021 sym/41 pcs) 9 img
DATA605_Final_ChunjieNan
Final Problem 1. Playing with PageRank You’ll verify for yourself that PageRank works by performing calculations on a small universe of web pages.Let’s use the 6 page universe that we had in the previous discussion For this directed graph, perform the following calculations in R. Form the A matrix. Then, introduce decay and form the B matrix...
10116 sym R (46937 sym/150 pcs) 24 img
DATA622_Final_ChunjieNan
Library library(readr) library(DataExplorer) library(skimr) library(ggplot2) library(corrplot) ## corrplot 0.92 loaded library(dplyr) ## ## Attaching package: 'dplyr' ## The following objects are masked from 'package:stats': ## ## filter, lag ## The following objects are masked from 'package:base': ## ## intersect, setdiff, setequal, u...
13956 sym R (10797 sym/57 pcs) 8 img 3 tbl
DATA605_week13_discussion_ChunjieNan
A boat is being pulled into a dock at a constant rate of 30ft/min by a winch located 10ft above the deck of the boat. 10^2 + x^2 = y^2 derivative 2x * dx/dt = 2y * dy/dt 50 feet out? x=50 102+x2=y^2 y2=102+50^2 y^2=100+2500 y=50.99 50 * dx/dt= 50.99 * 30 dx/dt = 30.59 15 feet out? x=15 102+x2=y^2 y2=102+15^2 y^2=100+225 y=18.02 15 * dx/dt=18....
616 sym
DATA605_HW13_ChunjieNan
1. Use integration by substitution to solve the integral below. \(\int4e^{-7x}dx\) substitution of u, u=-7x then, \(\frac{du}{dx}\) = -7 dx = \(-\frac{1}{7}du\) replace dx, \(4\int-\frac{1}{7}e^udu\) with substitution of u, \(-\frac{4}{7}e^{-7x}+c\) 2. Biologists are treating a pond contaminated with bacteria. The level of contamination is chang...
2555 sym R (195 sym/4 pcs)
DATA605_Week12discussion_ChunjieNan
Description of Data The Child Health and Development Studies investigate a range of topics. One study, in particular, considered all pregnancies between 1960 and 1967 among women in the Kaiser Foundation Health Plan in the San Francisco East Bay area. case: id number bwt: birthweight, in ounces gestation: length of gestation, in days parity: bina...
1367 sym R (3878 sym/19 pcs) 3 img 2 tbl
Module5_ChunjieNan
DATA608Module5ChunjieNan Beginner: This is one of two homework assignments you can complete for this week (you must do two, you may do all three for extra credit). This is geared towards those of you who have never worked with javascript before. Your assignment should be in the form of an HTML page, which I will be able to run locally. Refer to the...
1882 sym 1 tbl
DATA605_HW11_ChunjieNan
Assignment 11 Using the “cars” dataset in R, build a linear model for stopping distance as a function of speed and replicate the analysis of your textbook chapter 3 (visualization, quality evaluation of the model, and residual analysis.) Library library(tidyverse) ## ── Attaching packages ────────────────�...
1223 sym R (1996 sym/23 pcs) 6 img
DATA605_discussion11_ChunjieNan
Object Overview Using R, build a regression model for data that interests you. Conduct residual analysis. Was the linear model appropriate? Why or why not? Data Description:The heart and body weights of samples of male and female cats used for digitalis experiments. The cats were all adult, over 2 kg body weight. This data frame contains the foll...
1602 sym R (1621 sym/21 pcs) 6 img
DATA605_HW12_ChunjieNan
Data Discription The attached who.csv dataset contains real-world data from 2008. The variables included follow. Country: name of the country LifeExp: average life expectancy for the country in years InfantSurvival: proportion of those surviving to one year or more Under5Survival: proportion of those surviving to five years or more TBFree: propor...
3903 sym R (6477 sym/33 pcs) 11 img 3 tbl