Fit a power model to the set of data

조회 수: 3(최근 30일)
Ro Al
Ro Al 2020년 12월 1일
편집: Image Analyst 2020년 12월 1일
I need to fit a power model in the following data below and get its coeffiecient of regression/ (r^2) and predict the lane width at distance 2m:
Distance,m= [2.4 1.5 2.4 1.8 1.8 2.9 1.2 3 1.2]
Lane width,m= [2.9 2.1 2.3 2.1 1.8 2.7 1.5 2.9 1.5]
The model should be in the form of y=constant*x^constant

답변(2개)

Abdolkarim Mohammadi
Abdolkarim Mohammadi 2020년 12월 1일
Type cftool in the command window to open Curve Fitting toolbox. Then you can import your data and fit the power function.

Image Analyst
Image Analyst 2020년 12월 1일
편집: Image Analyst 2020년 12월 1일
Why do you think this follows a power law?
Distance = [2.4 1.5 2.4 1.8 1.8 2.9 1.2 3 1.2]
LaneWidth = [2.9 2.1 2.3 2.1 1.8 2.7 1.5 2.9 1.5]
plot(Distance, LaneWidth, 'b.-', 'MarkerSize', 20);
grid on;
xlabel('Distance', 'FontSize', 18);
ylabel('LaneWidth', 'FontSize', 18);
For what it's worth, I'm attaching a demo to do a non-linear fit to a power law. You can adapt it as needed.

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