MATLAB: Defining Matrices

$\%$In this activity you will learn how to define matrices, use the size$()$ command to find the size

$\%$of a matrix, generate an identity matrix, and also compute the transpose of a matrix using

$\%$ the $".\text{'}"$ operator.

$\%$Matrices in Matlab can be constructed by entering each row of values.

$\%$Rows are separated from each other using a semicolon.

$\%$For example, consider the $24$ matrix $B$ defined as:

$\%$The size$()$ function can be used to compute the number of rows and columns of a matrix.

$\%$compute the number of rows and columns of B by using the size$()$ function and store these values.

$[$numRowsTest$,$ numcolsTest$]=$size$(B)$

$\%$The eye$()$ function can be used to create an $n$ by $n$ identity matrix.

$\%$ create the $33$ identity matrix and store it as I.

$I=$eye$(3)$

$\%$The "dot$-$tic" operator can be used to transpose a matrix.

$\%$Take the transpose of the matrix B and store it as the matrix C$.$

$C=B{*}^{\text{'}}$

Script $8$

$\%$Define the $33$ matrix A with all $1\text{'}$s in the first row, all $2\text{'}$s in the second row,

$\%$and all $3\text{'}$s in the $3$rd row.

$\%$ Use the size$()$ function to compute the number of rows and columns of matrix A$.$

$\%$ store these quantities as variables numRows and numcols.

$\%$use the eye$()$ function to create the $44$ identity matrix. Store this matrix as I.

$\%$Compute the transpose of the matrix A$.$ Store this transposed matrix as the matrix D$.$

Assessment:

Matrix A is correct

numRows variable value is correct

numCols variable value is correct

Identity matrix is correct

Matrix D is correct