Graphing and curve fitting
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GRAPHING AND CURVE FITTING Physics 270
description
Graphing and curve fitting. Physics 270. Graphing. y ( x )Data Set #1. Graphing. What about error bars?. Graphing. Data Set #2. Graphing. Linear Regression Analysis AKA Linear Least Squares analysis. Simple linear regression describes the linear relationship between a predictor - PowerPoint PPT Presentation
Transcript of Graphing and curve fitting
Graphing and curve fitting
Graphing and curve fittingPhysics 270Graphingy(x)Data Set #1
t (s)y (cm)11.323.534.245.057.068.8710.1812.5913.01015.6
Graphing
What about error bars?GraphingData Set #2
t (s)y (cm)10.823.033.544.255.165.976.887.598.1109.0Graphing
Linear Regression AnalysisAKA Linear Least Squares analysisSimple linear regression describes the linear relationship between a predictor variable, plotted on the x-axis, and a response variable, plotted on the y-axis
Independent Variable (X)dependent Variable (Y)Linear Regression AnalysisAKA Linear Least Squares analysis
XY
1.0
Linear Least squares Analysis
The best linear approximation involves finding values of a0 and a1 to minimizeAbsolute Deviation
Linear Least squares Analysis
Linear Least squares AnalysisLinear Least squares Analysis
Linear Curve fitting
Example from Literature
Am. J. Phys. 67, 528 (June 1999).Barbara S. Andereck
