Assignment #6 - Matrix Operations and Construction

 Full R code used for tasks 1-3:




The printed output or matrices from each task:



Summaries of each operation:


1. Matrix addition and subtraction:

The "A + B" function adds the elements of matrices A and B, and the "A - B" function subtracts the elements of matrix B from A. Both of these functions result in a new matrix of the same size. 

2. Create a diagonal matrix: 

The "diag(c(4, 1, 2, 3))" function creates a 4x4 matrix with the indicated numbers along the diagonal and places zeros in each of the remaining positions. 

3. Construct a custom 5x5 matrix:

The "D <- diag(3, 5)" line creates a 5x5 matrix with the number 3 along the diagonal and zeros in the remaining positions. Then the "D[, 1] <- c(3, 2, 2, 2, 2)" line retains the first value, but replaces each value in column 1 to be the number 2. Finally, "D[1, 2:5] <- 1" creates the first row pattern to be (3, 1, 1, 1, 1), and completes the custom matrix. 

GitHub link: 

https://github.com/hannahcardenas4/r-programming-assignments/tree/main/R_Programming_Fall2025_Cardenas_Hannah/Assignment_06_Matrix_Operations_and_Construction


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