一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写

R代寫--stats 102A Summer
時間:2021-07-08

Midterm_Description

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写Stats 102A Summer 2021, Lecture 1 with Miles Chen

Logistics

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写The midterm exam is timed. You will have 2 hours to complete the exam.

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写Exam content will cover material from Lecture 1-1, Lecture 1-2, Lecture 2-2, and Lecture 3-2. You should be familiar with the material needed to complete homework 1 to homework 3. (You do not need to have finished HW3 before the midterm.)

Topics: 

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写There will be several questions showing you some code and asking you *what* will happen when we run the code and *why* R produces the output. You are allowed to use R to figure out what the code will output. If the question asks why, be sure to answer why.

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写         For example, a question covering material from Lecture 1-1 could be:

         > x <- c(NA, NULL)

         > y <- c(NA, character(0))

         What will the following code return? If they return different results, why?

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写         > length(x) 

         > length(y)

         Using the same values of x and y from above, what will the following code return? If they return different results, why?

         > is.logical(x) 

         > is.logical(y)

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写There will be several questions asking you to write a few lines of code to perform a task. Questions will be simple enough so that a solution can be done with six lines of code or less. This is not a restriction. You can write twenty lines of code if you need to. This is simply a description of the level of complexity of the problems.

For these questions, you will write your code in a textbox. You should write the code in R Studio first and after you get it working, you will copy your code over to the textbox. Make sure you only copy the code. When we grade your exam, we will copy the code from the textbox into R and run it to evaluate it. Make sure you do not include stray symbols like + or > or # that sometimes precedes lines when you copy it. If it produces errors, you will not get points for your submission.

Example problem: I might show you the head of dataset and will ask you to use tidyr and/or dplyr to reshape the data frame and provide summary statistics by group.

Another example: I might provide the url of a website and ask you for the code needed to extract certain items.

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写Another example: I could provide a series of text strings and ask you to write a line of code that uses regular expressions to extract a particular portion or pattern.

Another example: I could ask you to write a vectorized function that will accept a vector of values and can calculate the corresponding outputs from a piece-wise function.

一站式論文代寫,英国、美国、澳洲留学生Essay代寫—FreePass代写These are just some ideas of problems that I could put on the exam.


學霸聯盟


在線客服

售前咨詢
售后咨詢
微信號
Essay_Cheery
微信
专业essay代写|留学生论文,作业,网课,考试|代做功課服務-PROESSAY HKG 专业留学Essay|Assignment代写|毕业论文代写-rushmyessay,绝对靠谱负责 代写essay,代写assignment,「立减5%」网课代修-Australiaway 代写essay,代写assignment,代写PAPER,留学生论文代写网 毕业论文代写,代写paper,北美CS代写-编程代码,代写金融-第一代写网 作业代写:CS代写|代写论文|统计,数学,物理代写-天天论文网 提供高质量的essay代写,Paper代写,留学作业代写-天才代写 全优代写 - 北美Essay代写,Report代写,留学生论文代写作业代写 北美顶级代写|加拿大美国论文作业代写服务-最靠谱价格低-CoursePass 论文代写等留学生作业代做服务,北美网课代修领导者AssignmentBack