User-defined function, MATLAB Programming

Your functions will allow you to create the following graph, which contains a piecewise function where a line exists in the first interval, a parabola in the second interval, and the sine function in the third interval. Notice that where each interval meets, points with an ‘o' marker are located. Each one of the 4 functions you create will plot something on a single figure.

Create a function called cs151f11assn5first. The purpose of this function is to plot the line of the first interval. This function has four input arguments (in this order): 

the x and y coordinates of a point on the line (matrix of two values: x and y)

the x and y coordinates of a point the line (matrix of two values: x and y)

a scalar of the beginning of the interval of the x-domain on the figure

a scalar of the end of the interval of the x-domain on the figure

This function does not return any values, meaning it has no output arguments.  This function will first calculate the slope of the line using the two points. To do this, calculate the change in y divided by the change in x, aka the rise over run equation.  You will also need to find the y-intercept. To do this, use the x and y values of one of the points and solve for b in the equation b mx y (remember, m is the slope you just calculated).  A vector of x-values will need to be created using the beginning and ending values of interval of the x-domain, with an increment of 0.1.  Then, create the y-values using the equation mx + b Finally, plot the line in red.

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Posted Date: 4/1/2013 3:34:35 AM | Location : United States

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