Module # 6 Doing math in R part 2

 VaShay Carpenter


Answer the following questions and post your answer on your blog:


1. Consider A=matrix(c(2,0,1,3), ncol=2) and B=matrix(c(5,2,4,-1), ncol=2).



    a) Find A + B

    b) Find A - B



2. Using the diag() function to:

    build a matrix of size 4 with: 

    the following values in the diagonal 4,1,2,3.



3. Generate the following matrix:


  Hint: You can use the command diag() to build it.




Github Link:

Comments

Post a Comment

Popular posts from this blog

Assignment #9: Visualization in R – Base Graphics, Lattice, and ggplot2

Image
 VaShay Carpenter Objectives Compare three visualization systems in R: base graphics, lattice, and ggplot2. Apply each system to the same dataset and observe similarities and differences. Develop clear, reproducible code and articulate your insights. Dataset Choose one dataset from the  Rdatasets collection Links to an external site. . Load it in R with: data("DatasetName", package = "PackageName") head(DatasetName) Tasks Base R Graphics Create at least two plots using base R functions. Examples: # Scatter plot plot(DatasetName$x, DatasetName$y, main = "Base: x vs. y", xlab = "x", ylab = "y") # Histogram hist(DatasetName$z, main = "Base: Distribution of z", xlab = "z") Lattice Graphics Use the lattice package to produce conditioned or multivariate plots. Examples: library(lattice) # Conditional scatter plot (small multiples) xyplot(y ~ x | factor(group), data = DatasetName,...
Read more

Module #2 Assignment

Image
Evaluating A Function  VaShay M. Carpenter Objectives Learn how to import data into RStudio. Review foundational R programming concepts and  GitHub workflows . Practice function debugging and evaluation in R. Evaluate  myMean  Function Use the vector: assignment2 <- c(16, 18, 14, 22, 27, 17, 19, 17, 17, 22, 20, 22) Consider this function: myMean <- function(assignment2) { return(sum(assignment) / length(someData)) } In RStudio, run  myMean(assignment2)  and record the output or error. On both your blog and GitHub repository, post: The result or error message from testing  myMean . An explanation of why the function fails or succeeds (hint: variable names). A good function should take an input x, process x, and return a result like a "black  box". If your function is looking for a specific name like assignment2 but that  variable name isn't defined inside the function's local scope, it will break or  produce unpredictable results....
Read more