Module # 2: RStudio and myMean

 

The Function myMean

1) This week we read the first three chapter of  our text book "The Art of R programming" by Matloff, and Chapter of our textbook called R packages by Wickham. The first three chapter of Matloff go over the basic set of R, how vectors, arrays, matrices, scalars, rows, columns, R testing, packages and other basic aspects of coding work inside of R. I have taken a few classes with R in the past and there is not much new here. It was a good refresher though for this assignment.  

2) The assignment I was tasked for this week was to evaluate the following function call myMean, provided with the data for myMean; assignement2. This is how it looked like: 
> assignment2<-c(16, 18, 14, 22, 27, 17, 19, 17, 17, 22, 20, 22)
> myMean<-  function(assignment2) { return(sum(assignment)/length(someData)) }
> myMean(assignment2)
 
3) The problem with the code above is that a lot of it is undefined. There is no data provided called "assignment" or called "someData". When run as-is in Rstudio, we get "Error in myMean(assignment2) : object 'assignment' not found", because it is not defined. If we wanted to fix it then to create something out of it we could do the following. Replace "assignment" with "assginement2", and "someData" with a "assignment2". Doing this we get the following:
> assignment2<-c(16, 18, 14, 22, 27, 17, 19, 17, 17, 22, 20, 22)
> myMean<-  function(assignment2) { return(sum(assignment2)/length(assignment2)) }
> 
> 
> myMean(assignment2)
[1] 19.25
>
4) As we can see above, the mean for "assignement2" is 19.25. There is no error being thrown out now, since all the variables of the function myMean are now defined and refer to the same set of numbers.  

Comments

Post a Comment

Popular posts from this blog

Module # 10 Building my own R package

  Creating the Tier List Package in RStudio 1) This is now week ten of this course and I am now starting to see the end. This week I tackle creating my very own package in R. This is a very first for me and I am very excited. Based on the title of this blog you can tell that I plan to create a package that allows users to create a tier list in RStudio. This will all take a lot of work, much more than I can do in a single assignment, so the only goal for this week is to create the  DESCRIPTION file for the package. This tell us everything that the package is about and its purposes. Here it is down below:
Read more

Module # 13 Shiny Web App

Image
  Creating My Own Package in R via RStudio 1) This week I learn about Shiny, a product from R that allows us to create web applications in R itself. This is a very powerful tool that uses client-server communication, HTML, layout and JavaScript programming to make web applications. This however is not what we will be using today complete our assignment. This week I will be creating my own R package that will be available via my GitHub.  2) I will be creating an R package that will allow users to create their own tier list in RStudio. This will help visualize what variables or objects are more important than others in rank. Users will be able to (hopefully) rank variables or other information in their data to help explain how things are ranked on a arbitrary scale according to the audience in mind. Such as creating a tier list of books based off of how much they sold, their reviews, or what genres are better. It can use objectively to reorganize the audiences focus or used to s...
Read more

Module # 4 Programming Structure

Image
  Hospital Data: Boxplot and Histogram 1) This week I am tasked with completing two major objectives. The first is to create a boxplot with some data I am given and the second is to create a histogram. The boxplot is to be a side by side boxplot, which I will be displaying Blood Pressure and Frequency. I will then create two histograms, one just about frequency and the other about blood pressure and frequency. The data I was given came in a way that I have to go and format it myself in RStudio. Here is what I came up with:
Read more