第三个任务是rankall函数,要求是不关心是哪个州,只要指定疾病和排名,就要返回一个数据框,里面存储着所有州该疾病该排名的医院名。 1rankall <- function (outcome, num ="best"){2data <- read.csv("outcome-of-care-measures.csv")34disease_list <- c("heart attack","heart failure","pneumonia")56i...
经过周末一个半天的努力,终于把这次的Assignment3做出来,然后做完Quiz4,顺利结束R Programming这门课程。 对这门课的综合吐槽就是,Roger老师的github头像好帅,动态视频更帅,视频内容还算充足,但远远不足以应付assignment。Assignment设计一个比一个精巧,难度一个比一个大,没有足够的耐性以及一定的基础,还真的很难独自...
3. Find the indices of 3, 4 and 5(mod 11) to the base 2. 4. Supoose p is of the form p = 2n + 1, n > 1. Prove that 3 is a primitive root (mod p). 5. It is known that 3 is a primitive root (mod 17) by Problem 4. Find the indices of 3, 4 and 5(mod 17) ...
of text.) If you used any software to break the code, submit it in the subfolder part-1. Such software can be in any programming language. It will not be evaluated for coding or style. quality. Its purpose is only to support your description. Part 2 (80%) — Advanced Fuzzing. So ...
This course is part of several tracks, including Data Analyst with R, Data Scientist with R, and R Programming, all of which can help you develop your knowledge. Prerequisites There are no prerequisites for this course 1 Intro to basicsStart Chapter Take your first steps with R. In this ...
指派问题(assignment problem) 属于0 - 1 整数规划,是一种特殊的整数规划问题。指派问题的标准形式(以人和事为例) 是:有n 个人和n 个事,已知第i 个人做第j 件事的费用为Cij (i; j = 1, 2,…n),要求确定人和事之间的一一对应的指派方案,使完成n件事的总费用最少。
To gain an understanding of the similarities and differences between R language analyses and C# language programming, it’s useful to examine a C# implementation of a chi-square test. In addition, the C# code can make a nice addition to your personal code library. Take ...
# This programming assignment WILL BE automatically graded. # DO NOT DELETE THIS NEXT LINE OF CODE # === pf <- read.delim('/datasets/ud651/pseudo_facebook.tsv') # ENTER YOUR CODE BELOW THIS LINE # === # ch6 prop_initiated与使用时长 # Create a line graph of the median proportion...
1. The assignment operator 在第一和第二行的expression里我们可以看到,=与 2. 在第四行,输入object的名字,可以解析到(evaluate)它的值,x的值为3 3. 用 objects() 可以显示出当前存储在local workspace中所有的object。第七个expression,我们给o赋值为当前所有的objects,包含有x,y,z。当创建了o之后,在第十...
Value assignment Value assignment > x <- 7 >x+3 [1] 10 > x+y Error: object ‘y’ not found > y <- 3 > x+y [1] 10 Value assignment Objects • Anything we manipulate/analyse/encounter in R is an object • Single values (e.g. x <- 7) • Vectors (e.g. Numerical, ...