Transcription of Numerical Methods Lecture 5 - Curve Fitting …
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Numerical Methods Lecture 5 - Curve Fitting …
CGN 3421 - Computer Methods GurleyNumerical Methods Lecture 5 - Curve Fitting Techniquespage 89 of 102 Numerical Methods Lecture 5 - Curve Fitting TechniquesTopicsmotivationinterpolationl inear regressionhigher order polynomial formexponential formCurve Fitting - motivationFor root finding, we used a given function to identify where it crossed zerowhere does ??Q: Where does this given function come from in the first place? Analytical models of phenomena ( equations from physics) Create an equation from observed data 1) Interpolation (connect the data-dots)If data is reliable, we can plot it and connect the dotsThis is piece-wise, linear interpolation This has limited use as a general function Since its really a group of small s, connecting one point to the nextit doesn t work very well for data that has built in random error (scatter)2) Curve Fitting - capturing the trend in the data by assigning a single function across the entire example below uses a straight line function A straight line is described generically b
CGN 3421 - Computer Methods Gurley Numerical Methods Lecture 5 - Curve Fitting Techniques page 96 of 102 re-write these equations, and put into matrix form
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