Download presentation

Presentation is loading. Please wait.

Published byAngel Jones Modified over 4 years ago

1
Introduction Fitting program - goal is to vary the fit parameters to minimize the chi-square defined as: data points errors function Fit parameters f{g,x) = 2πsqrt(length/g)

2
Basketball Movie Go to the notes for Week 3 find data Excel file time Y-velY-pos

3
Import to IGOR Make waves - called: tt, ypos and yvel Make table - Under Windows - new table Then cut from the Excel file and paste into IGOR table

4
Graph Position Data

5
Fit Data to a Polynomial This dialog box - from choosing Curve Fitting under Analysis in the main menu Built - in functions are available 3 terms or quadratic Specify waves for the fit

6
Results of Fit

7
Fit in a Range of Data With a graph selected - under the Graph menu select Show Info - then move cursors over the data points that define the range to be fitted

8
Procedure 1.Define error wave and inverse error wave. In this example: err and errinv= 1/err. 2.In the graph of period vs length, use markers for data and show error bars. 3.Define the user-function in the Procedure window. In this example pend 4.Make fitting coefficients wave and set to reasonable starting values. In this example coef.

9
Evaluating Fit

10
Terminal Velocity

Similar presentations

OK

Instructor: Professor Cora Martinez, PhD Department of Civil and Environmental Engineering Florida International University.

Instructor: Professor Cora Martinez, PhD Department of Civil and Environmental Engineering Florida International University.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google