Publications by HJ Wu
programming in class exercise and HW
programming exercise 1-5 HW 1-5 Exercise Exercise 1 (GIF plot) Exercise 2 (need explain) Exercise 3 (unsolved) Exercise 4 Exercise 5 HW HW 1 HW 2 HW 3 HW4 HW5 HJ Wu 2020/5/13 Exercise Exercise 1 (GIF plot) What does the R script do? Revise the code so that it does the same job without resorting to the use of a nested ‘for’ loop. # orig...
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Function HW 1-5
Functions exercise 1-5 HW 1 (a) test if any pairs of the five variables: read, write, math, science, and socst, are different in means. (c) Perform all pairwise simple regressions for these variables: read, write, math, science, and socst. HW 2 HW 3 HW 4 HW 5 HJ Wu 2020/5/011 HW 1 library(dplyr) library(MASS) library (reshape) dta <- rea...
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Statistical graphics Exercise 1,3
Statistical graphics Exercise Exercise 1 Exercise 3 HJ Wu 2020/4/26 Exercise 1 The distribution of personal disposable income in Taiwan in 2015 has a story to tell. Revise the following plot to enhance that message loading data and check data structure dta<-read.csv("C:/Users/USER/Desktop/R_data management/0420/data/income_tw.csv", header=T)...
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grammar of graphics HW 1,3,5
grammer of graphics HW HW 1 HW3 HW5 HJ Wu 2020/4/25 HW 1 Fifty male and fifty female students fill out the same questionnaire in weekly intervals starting five weeks before an important examination to measure state anxiety. The research interests are: 1. whether there are gender difference in state anxiety 2. individual differences in sta...
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grammar of graphics HW 2
HW2 Use the markdown file to replicate the contents of Weissgerber, T.L., Milic, N.M., Winham, S.J., Garovic, V.D. (2015). Beyond Bar and Line Graphs: Time for a New Data Presentation Paradigm. PLOS Biology , 13. Using R for the examples in "Beyond Bar and Line Graphs: Time for a New Data Presentation Paradigm’ What is this? Here I show how w...
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grammar of graphics
grammer of graphics exercise 1-6 exercise 1 exercise 2 exercise 3 exercise 4 exercise 5 exercise 6 HJ Wu 2020/4/25 exercise 1 Find out what each code chunk (indicated by ‘##’) in the R script does and provide comments. base graphics plot(women, type='n') #scatter plots of women dataset, "n": no plotting points(women[1,]) # plot the fi...
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0420 ggplot exercise 2, 4
grammer of graphics exercise 2, 4 exercise 2 exercise 4 HJ Wu 2020/4/21 exercise 2 The data set is concerned with grade 8 pupils (age about 11 years) in elementary schools in the Netherlands. After deleting pupils with missing values, the number of pupils is 2,287 and the number of schools is 131. Class size ranges from 4 to 35. The respons...
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0413 Trellis graphics in class exercise 2-4
0413 Trellis graphics in class exercise in class exercise 2 in class exercise 3 in class exercise 4 HJWu 2020/4/19 in class exercise 2 Create a new student-teacher ratio variable from the enrltot and teachers variables in the data set Caschool{Ecdat} to generate the following plot in which reading scores (readscr) for grade span assignment g...
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0413 HW 3,5
0413 base graphic HW 3,5 HW 3 HW 5 HJWu 2020/4/18 HW 3 loading data and check data structure library(MASS) dta<-nlschools head(dta) ## lang IQ class GS SES COMB ## 1 46 15.0 180 29 23 0 ## 2 45 14.5 180 29 10 0 ## 3 33 9.5 180 29 15 0 ## 4 46 11.0 180 29 23 0 ## 5 20 8.0 180 29 10 0 ## 6 ...
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0413 HW 4
0413 HW exercise 4 HW 4 Huei Jiuan Wu 04/17/2020 HW 4 Use the dataset to replicate the plot below: load data and check data structure dta<-read.table("C:/Users/user/Desktop/sat_gpa.txt", header=TRUE) str(dta) 'data.frame': 6 obs. of 5 variables: $ College: Factor w/ 6 levels "Barnard","Bowdoin",..: 1 6 2 4 3 5 $ SAT_No : int 1210 12...
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