- Details
- Parent Category: Programming Assignments' Solutions

# We Helped With This MATLAB Programming Assignment: Have A Similar One?

Category | Programming |
---|---|

Subject | MATLAB |

Difficulty | Undergraduate |

Status | Solved |

More Info | Write My Matlab Assignment |

Let us worry about your assignment instead!

- Details
- Parent Category: Programming Assignments' Solutions

SOLVED

Category | Programming |
---|---|

Subject | MATLAB |

Difficulty | Undergraduate |

Status | Solved |

More Info | Write My Matlab Assignment |

Please write a matlab script for the attached matlab question

Q2.
In the accompanying file, climate_data.txt, the average global temperature (in degrees Fahrenheit) is
provided for the years 1880 through 2015 [from NOAA.gov]. The first column of data contains the
number of years since 1880 (i.e. "10" would be the year 1890), and the second column contains the
average global temperature for that year. As with any natural phenomena, these temperatures consist of
underlying trends overlaid with random fluctuations. We will use least-squares in an attempt to extract
these underlying trends.
Following MATLAB code constructs the best cubic polynomial fit to the data, use it to plot both the data
and resulting predictions from 1880 through 2025. The code is commented to better explain the process:
>> load climate_data.txt% load data into MATLAB
>> years = climate_data(:,1); % extract 1st column as "years" vector
>> temps = climate_data(:,2); extract 2nd column as "temps" vector
& build the matrix and solve the least-squares system.
% Note: the .^ notation raises each entry to the requested power
>> A = [years.^3, years. ^2, years. ^1, years. ^0]; % construct A
>> b= temps; % build the right-hand side
>> x = (A *A) (A¹*b); solve the least-squares problem
& set the dates that we want to plot over (offset by 1880)
>> dates = linspace (0, 145, 200);
& compute the projections based on the model
>> proj
x (1) *dates.^3 + x (2) *dates. ^2 + x (3) *dates.^1 + x (4) *dates. ^0;
plot the data as black dots and the model as a blue line
>> plot (years+1880, temps, 'k.', dates+1880, proj, 'b-')
>> xlabel('year')
>> ylabel('temperature')
>> title ('Climate data and cubic fit!).
Note here that our cubic polynomial has the form
p(t) = x₁t³ + x₂t² + x3 + x4
so the matrix in our over determined linear system has the form
A =
tz
⠀
tm
1
⠀
1
.0
m
Perform the above commands. Repeat the process for both a quadratic model and a linear model.
For these models, you should only need to modify the lines
A = [years. ^3, years.^2, years.^1, years. ^0];
and
proj = x (1) *dates.^3 + x (2) *dates. ^2 + x(3) *dates.^1 + x (4) *dates. ^0;
and
title ('Climate data and cubic fit')
Turn in printouts of your three plots for question 2 only.
DO NOT print matrices A and b for either questions 1 and 2!!

Is it free to get my assignment evaluated?

Yes. No hidden fees. You pay for the solution only, and all the explanations about how to run it are included in the price. It takes up to 24 hours to get a quote from an expert. In some cases, we can help you faster if an expert is available, but you should always order in advance to avoid the risks. You can place a new order here.

How much does it cost?

The cost depends on many factors: how far away the deadline is, how hard/big the task is, if it is code only or a report, etc. We try to give rough estimates here, but it is just for orientation (in USD):

Regular homework | $20 - $150 |

Advanced homework | $100 - $300 |

Group project or a report | $200 - $500 |

Mid-term or final project | $200 - $800 |

Live exam help | $100 - $300 |

Full thesis | $1000 - $3000 |

How do I pay?

Credit card or PayPal. You don't need to create/have a Payal account in order to pay by a credit card. Paypal offers you "buyer's protection" in case of any issues.

Why do I need to pay in advance?

We have no way to request money after we send you the solution. PayPal works as a middleman, which protects you in case of any disputes, so you should feel safe paying using PayPal.

Do you do essays?

No, unless it is a data analysis essay or report. This is because essays are very personal and it is easy to see when they are written by another person. This is not the case with math and programming.

Why there are no discounts?

It is because we don't want to lie - in such services no discount can be set in advance because we set the price knowing that there is a discount. For example, if we wanted to ask for $100, we could tell that the price is $200 and because you are special, we can do a 50% discount. It is the way all scam websites operate. We set honest prices instead, so there is no need for fake discounts.

Do you do live tutoring?

No, it is simply not how we operate. How often do you meet a great programmer who is also a great speaker? Rarely. It is why we encourage our experts to write down explanations instead of having a live call. It is often enough to get you started - analyzing and running the solutions is a big part of learning.

What happens if I am not satisfied with the solution?

Another expert will review the task, and if your claim is reasonable - we refund the payment and often block the freelancer from our platform. Because we are so harsh with our experts - the ones working with us are very trustworthy to deliver high-quality assignment solutions on time.