Science:Math Exam Resources/Courses/MATH152/April 2010/Question A 12

MATH152 April 2010

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Question A 12
Write the matrix A that would result from the following lines of MATLAB code: A = zeros(2,3); A(1,1) = 2; A(2,3) = 3;

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Hint
What is the dimension of A? All entries of A are initially zero. Which entries are then changed in line 2 and 3?

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Solution

Found a typo? Is this solution unclear? Let us know here. Please rate my easiness! It's quick and helps everyone guide their studies. These commands have the following effects, in sequence: "A = zeros(2,3);" creates a matrix of zeroes having 2 rows and 3 columns. "A(1,1) = 2;" changes the value in the first row, first column entry to 2. "A(2,3) = 3;" changes the value in the second row, third column entry to 3. The result is the following matrix, "A". $A=\left[{\begin{array}{ccc}2&0&0\\0&0&3\end{array}}\right]$