In MATLAB how do I... 1 . Download the data file, lab7 data.mat, to Matlab’s wor

Question

In MATLAB how do I...

1. Download the data file, lab7 data.mat, to Matlab’s working directory and read it into Matlab using the load command:

Use the whos command to examine your workspace: you should see two vectors, V and Fv. The vector V contains voltage values, in units of mV; the vector Fv contains the left-hand side of Eqn. (2) that were measured at the same times. Use the size command to print the dimensions of V and Fv to your diary.

2. Use the normal equations (AT Axˆ = AT b) to fit the data to a line: i.e. find C, D such that F(V) = C+DV (3)

Print C and D to your diary.

3. Your fitted curve, C + DV , will not exactly go through all of the data points. Report the

average error as follows:

Here yLin is the vector of points that lie along the line you fit; if your over-determined linear system is Ax = b, then yLin = projCol Ab. M is the total number of data points.
Print E Linear to your diary.

Explanation / Answer

If it is public, anyone who has access to your class file can access the method. In some circumstances, this is perfectly fine. If the method is private, only the functions inside of that class can call the method. This is used as utility methods to do something you do not want just anyone who uses the class to do. Protected gives public function to all child classes.

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