Purchase Solution

Matlab statsitics

Not what you're looking for?

Ask Custom Question

Two related questions.

First - I need a good way to display error bars on a
scatter plot. I have a set of x and y data, that I have attached as a text file along with y+err and y-err data (denoted +/-). The err values vary from point to point, and +err and -err are not necessarily the same.

Second - I am using the data to get a slope and an intercept. Once I
know. I need an easy way to calculate the errors in
slope and intercept? (This may be more of a math question than a MatLab
question, but I assume someone here knows the solution.)

Thanks!

Please do an example In full detail since I will be doing this for my physics lab reports for the next two months and I really need to know how to do proper linear regression using Matlab.

Also I need a Chi square test to verify that my fit is in fact good. Can you also please explain that to me thanks! As you can see, I am not so great in Statistics so I need help.

Attachments
Purchase this Solution
Solution Summary

This provides methods of working with errors and Chi square in Matlab.

Solution Preview

The attached Matlab script has examples of how to plot error bars and how to estimate errors in slope and intercept of a linear fit.

File Rb85_N_mod.txt contains your original data with the "+/-" column removed.

Note that I ADDED ERRORS to you original data to make the illustration more visible, as your original errors ...

Purchase this Solution
Free BrainMass Quizzes
Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.

Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

View More Free Quizzes
Related BrainMass Solutions

  • Perform hypothesis testing on one variable's data

    Also, provide some information about why samples are used instead of populations Hint: Test a claim that American workers have an intrinsic job satisfaction mean level of 5.0 Using Microsoft excel Add - Ins  Megastat Descriptive statsitics Descriptive

  • linear time-invariant discrete-time system and Matlab codes

    Please see the attached file for detailed solutoin and Matlab codes. You can copy the Matlab codes at the end of the Word file to your Matlab editor directly. Or use the attached .m file. However, you need to have a 7.0 or higher to open it.

  • Plot Magnitude of a Sequence in Matlab

    Also, how would you plot the magnitude of X[k] in Matlab? The DFT in Matlab is done by function fft (see a reference page from Matlab Help in the attached Word file).

  • Control Systems using Matlab to Obtain Nyquist plot

    Determine these both graphically, from the appropriate bode plots, and using the Matlab functions margin and bandwidth Please find the attachment for the solutions. The Matlab scripts for both questions are also included.

  • linear time-invariant continuous system and Matlab

    Finally, the application is verified in Matlab codes.

  • Use Matlab to calculate correlation between heartbeat record

    80488 Use Matlab to calculate correlation between heartbeat record Load ECG data from exercise 1 into MATLAB. Select a segment of recording encompassing at least 10 cycles of the heartbeat.

  • plot continuous and discrete-time signals in Matlab

    or (2) save the *.m files to the current Matlab directory and type in the file name after the ">>" sign in the command window. The solution shows how to plot continuous and discrete-time signals in Matlab. Matlab codes are plots are included.

  • MATLAB (Must be coded for MATLAB)

    113447 MATLAB (Must be coded for MATLAB) I need a detailed script in order to show this works in MATLAB. I need number 18 or the circle problem, and thank-you so much for your help.

  • Simulating discrete time signals in Matlab

    446080 Discrete-Time signals are simulated in Matlab. This solution comprises of two problems solved with matlab code and plots. All answers include matlab code and plots pasted on a word document.

  • MATLAB (Must be coded for MATLAB)

    113446 MATLAB (Must be coded for MATLAB) I need a detailed script in order to show this works in MATLAB. This problem. All I need is the circled #3 problem, but only required to do the top a) and b) graphs.

View More Related Solutions