Computes the least squares fit of the data, Programming Languages

Your solution to the problem should be housed within a while loop, which allows the grader to test your solution repeatedly without having to re-execute the script, as shown in class. You should first display the purpose of the program, and then you should prompt the user if he/she wishes to run the code. If the user responses 'y' or 'Y', you should then run the actual problem solution (whatever that entails). After running your solution, you should prompt the user if he/she wishes to run it again, and if so, do so. Otherwise, exit the program with a closing goodbye statement.

In this final project you will implement a user-defined matlab function named lsquares with the following "prototype":

function [m,b,e,s,r] = lsquares(x,y)

which computes the least squares regression line fit to the data whose coordinates are in the arrays x and y. The output arguments m and b are always computed and returned, but the user has the option to get e,s and r, if he/she so desires. If these outputs are not requested, your code in your function should NOT compute them.

You will code up the function lsquares in the .m file "lsquares.m", and also a driver program which performs the following steps (as long as the user wants to do so):

1) Prompt the user for a plain text data file, which has 4 columns of data: the first column is string data, the remaining 3 are numeric.

2) Read the second, third, and fourth columns into the variables x,y,and y_true, respectively.

3) Prompts the user for whether he/she wants to see the correlation coefficient r.

4) Computes the least squares fit of the data. You are to obtain r only if the user so desired. On the same plot, plot the x vs. y data with red stars, x vs. the least squares fit with solid blue line, and x vs. y_true with a solid green line. You should output to the user the resulting slope, intercept, and r value (only if the user requested that piece of information).

EXTRA CREDIT: In addition to using your function, lsquares, to compute the least squares fit, use the built-in matlab function polyfit to find the coefficients m and b. Display matlab's m and b values and compare them to yours.

Posted Date: 3/9/2013 3:00:00 AM | Location : United States







Related Discussions:- Computes the least squares fit of the data, Assignment Help, Ask Question on Computes the least squares fit of the data, Get Answer, Expert's Help, Computes the least squares fit of the data Discussions

Write discussion on Computes the least squares fit of the data
Your posts are moderated
Related Questions
Implement a two-dimensional table in Prolog. Your program will contain: An insert_entry predicate that takes a table, row, column and an entry and inserts the entry at the g

write and compile a simple program in Assembly Language that compute and print student grades for a course.which you can open a file, read from it, and compute the results...using

develop a pseudocode algorithm to determine the total amount of extra cost changed to the organizers for expenses accurednduring the workshop. the code is to be written for an unde

Write a script called 'prob2.m' that asks the user if they wish to clear the variables in the workspace. If the user responds with the strings 'y' or 'yes' then the workspace shoul

I have a problem which seems to be quite a rare one and I can safely say I know what exactly what is causing it. After some process of elimination I reached the conclusion that, in

Given a file named maze1.txt whose contents is 1 0 2 2 1 2 3 0 3 2 2 1 2 0 2 2 3 0 1 1 3 1 0 0 2 0 3 0 0 1 2 0 3 2 2 0 1 2 3 2 1 0 0 1 1 0 0 0 your program when run as a.out

1 Problem Description The task of the assignment is to build a book recommendation system for Auer Libraries. The system is to be implemented in Prolog and as the owners of t

do you solve questions of assigments?

Explain the Goto Statement - Computer Programming? The goto statement is employed to alter the normal sequence of program execution by transferring control to some other part o

Return a new picture with each pixel''s color values made up of 80% of the color values of the corresponding pixel in the first picture and 20% of the color values of the