How to calculate the coefficients of a line in the standard form

Question

Ahmed Galal 2021-6-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/858305-how-to-calculate-the-coefficients-of-a-line-in-the-standard-form

回答： Image Analyst 2021-6-17

I need a MATLAB code to calculate A, B, and C in Ax+By+C=0 considering two points

x1=-2; x2=3; y1=4; y2=-5

Thanks

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Answer 1

Image Analyst 2021-6-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/858305-how-to-calculate-the-coefficients-of-a-line-in-the-standard-form#answer_726645

在 MATLAB Online 中打开

x1=-2; x2=3; y1=4; y2=-5
coefficients = polyfit([x1,x2], [y1, y2], 1)
%  I need a MATLAB code to calculate A, B, and C in  Ax+By+C=0
% Equation is y = coefficients(1) * x + coefficients(2), or
% coefficients(1) * x + coefficients(2) - y = 0
% so
A = coefficients(1)
B = 1
C = coefficients(2)