# lab3 - CSC 113 Lab Assignment 3 1 Write a MATLAB script...

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Unformatted text preview: CSC 113 Lab Assignment 3 1. Write a MATLAB script ﬁle that computes and plots 5 cycles of a sine wave as a function of time. Assume the sine wave has a frequency of f = 100 Hz, an amplitude of A = 0.9, and a phase angle of φ = 45 degrees. The equation of the sine wave is given by y(t ) = A sin(2π f t + φ ) 2. Write a script that on the same graph plots the following curves: (a) y1 (x) = 10 cos(x2 ); √ (b) y2 (x) = 15/ x2 + 5 2 (c) y3 (x) = 10 e−(x+3) Assume that x ranges from −1 to +1. Use enough values of x so that the curves look smooth. In addition: • Add labels to the x and y axes; • Add a title to the graph; • Add a legend to the graph; • Force the y1 curve to be a solid red line; • Force the y2 curve to be a dashed blue line with ‘+’ markers; • Force the y3 curve to be a dashed-dot green curve with the ‘◦’ marker. 3. Use the surf command (short for “surface”) to graph the function z(x, y) = cos 15 x2 + y2 ∗ e−2(x 2 +y2 ) for −1 ≤ x ≤ 1 and −1 ≤ y ≤ 1. (a) Add labels to the x, y and z axes; (b) Add a title to the graph; (c) Compare the output with the plot generated using the mesh commmand. ...
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