hw1.docx - ENED 1091 Engineering Models II Homework...

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ENED 1091: Engineering Models II Homework Assignment #1 Due: Week of January 22 nd at the beginning of your Recitation Section Problem 1 : Array Indexing For this problem, you will need to download the HW1.mat file from Blackboard. Drop it in your current MATLAB folder then type: load HW1 at the MATLAB command prompt. You should now have the following three variables (x, y, and M) in your workspace with the values shown below. Don’t make any modifications to these variables. x = 4 5 -1 5 3 -2 0 2 5 5 -1 5 5 3 4 y = -1 5 5 4 5 3 -2 4 5 3 4 3 1 3 -1 M = 2 2 3 2 -4 -5 -2 7 3 0 -2 5 -3 -2 5 -5 -5 0 2 -2 -4 -1 -1 2 1 4 -1 2 -4 -3 For all parts of this problem, don’t put a semicolon at the end of your command so you can copy the results as well as your MATLAB command. a) What MATLAB command will pull out entries 7 thru 12 in vector, x, and store them in a vector called a? Command and Results: a = x (7:12) a = 7 8 9 10 11 12 b) What MATLAB command will pull out every other entry of the vector, x, starting at entry 4 and ending at entry 12 and store these entries in a vector called b? Command and Results: b = x (4:2:12) b = 4 6 8 10 12 c) What MATLAB command will pull out the7 in matrix, M, and store it in a scalar variable called c?
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