Science:Math Exam Resources/Courses/MATH152/April 2013/Question A 29
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Question A 29 

Suppose we run the following MATLAB code. a=1:2:5; b=3:4:11; A=[a;b]; Specify the matrix A that is produced by this code. 
Make sure you understand the problem fully: What is the question asking you to do? Are there specific conditions or constraints that you should take note of? How will you know if your answer is correct from your work only? Can you rephrase the question in your own words in a way that makes sense to you? 
If you are stuck, check the hints below. Read the first one and consider it for a while. Does it give you a new idea on how to approach the problem? If so, try it! If after a while you are still stuck, go for the next hint. 
Hint 1 

Remember that a = x:y:z in MATLAB means create a vector a with first entry x, step size of y for entries across and stop when you exceed z. So for example, the first line produces

Hint 2 

The line A = [a;b] tells the computer to make a matrix with a on top then b underneath. 
Checking a solution serves two purposes: helping you if, after having used all the hints, you still are stuck on the problem; or if you have solved the problem and would like to check your work.

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. Following the hints, we can quickly see that
Keep in mind that the code b=3:4:11; gives us the second row that begins at 3, increments entries by 4 and then goes up to 11. 