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====== Differences ====== This shows you the differences between two versions of the page.

--- gibson:teaching:spring-2015:math445:lab2 [2015/01/28 12:34]
gibson
+++ gibson:teaching:spring-2015:math445:lab2 [2015/01/28 12:40] (current)
gibson
@@ Line 3: / Line 3: @@
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-**Problem 1.** Show how to create the following vectors in Matlab three different ways,
+**Problem 1.** Creation of vectors. Show how to create the following vectors in Matlab three different ways,
 using square brackets, ''linspace,'' and colon syntax.
@@ Line 32: / Line 32: @@
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-**Problem 2:** subvectors. Given the $x$ vector of problem 1d,
+**Problem 2:** Extracting and assigning subvectors. Given the $x$ vector of problem 1d,
 **(a)** What is the value of the 73th element of $x$?
@@ Line 47: / Line 47: @@
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-**Problem 3.**
+**Problem 3.** Creation of matrices, extracting and assigning elements and subvectors.
 **(a)** Create the matrix A
 \begin{eqnarray*}
@@ Line 64: / Line 65: @@
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-**Problem 4.**
+**Problem 4. Extracting and assigning submatrices.**
 **(a)** Create a $5 \times 5$ matrix A of zeros.
 **(b)** Assign the upper-left $2 \times 3$ submatrix of A to
+\begin{eqnarray*}
 \left[ \begin{array}{rrr} 1 & -4 & 3 \\  6 & 2 & 1 \end{array} \right]
+\end{eqnarray*}
 **%%(c)%%** Assign ones to the bottom-right $3 \times 3$ submatrix of A.
@@ Line 76: / Line 80: @@
 **(e)** What is the fourth row of $A$?
+**(f)** What is the central $3 \times 3$ submatrix of $A$?