Computes the least squares fit of the data, Programming Languages

Assignment Help:

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.


Related Discussions:- Computes the least squares fit of the data

Create a structure to represent deck of cards, We want to create a structur...

We want to create a structure that will represent a deck of cards (not necessarily full). Each card has a character (between '2' to '9' and 'T', 'J', 'Q', 'K', 'A') and a suit (dia

Calculating percentage differences-circuit diagram, In the procedure sectio...

In the procedure section, it is important to have a clear circuit diagram with component values and a brief, but accurate description of each step taken. 1. Tables for both the

Program that takes integer array of 8 elements, Write a program that takes ...

Write a program that takes integer array of 8 elements from user and find the smallest element among them using pointers

Program for implement xslt, The aim of this task is to gain experience in u...

The aim of this task is to gain experience in using the popular Web languages XSLT, XQuery, DTD, XML Schema and RDF. The Content: The University is organizing a stage show wh

Write a program to decrypt encrypted messages, You are working for a crypto...

You are working for a cryptography department, where one of your jobs is to decipher intercepted messages that have been encrypted using a book cipher. The messages are sent by dif

Write an application to assign seats for each flight, ( Airline Reservation...

( Airline Reservations System ) A small airline has just purchased a computer for its new automated reservations system. You have been asked to develop the new system. You are to w

Computer design project , I''m studying electrical engineering, and this se...

I''m studying electrical engineering, and this semester im taking course that called Computer Design. in this course they need me to a final project about any thing we took during

Operating systems, list of 10 operating systems with their hardware specifi...

list of 10 operating systems with their hardware specification and also list any 5 software associated with each operating system

Explain inheritance and polymorphism in lingo programming, Question: (a...

Question: (a) Explain the concepts of Inheritance and Polymorphism in Lingo programming. (b) Write short descriptions on parent scripts and child objects in Lingo object

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd