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How can I make a fuction that takes two points and returns the coefficients a, b

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Ihor
Ihor 2022-12-9
回答： Image Analyst 2022-12-10
How can I make a fuction that takes two points p1 and p2 in 2D plane as input parameters
and returns the coefficients a, b of a linear function f(x) = a*x + b that crosses these points. The points are defined as vectors of two
values: pi =[xi, yi], but without using any ToolBoxes and cycles?
function [a,b] = linfunc(P1, P2)
  1 个评论
David
David 2022-12-9
编辑：Voss 2022-12-9
Hi! This seems like a homework. Anyways, there are some hints:
> You can always get the slope of a line using m = (f(b) - f(a)) / (b - a). Once you get it, your function is almost done!
Good luck <3

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回答（2 个）

John D'Errico
John D'Errico 2022-12-9
Surely this is homework. So I hope people do not do your homework for you. At the same time, it is easy to find the formulas online, for example here:
https://content.byui.edu/file/b8b83119-9acc-4a7b-bc84-efacf9043998/1/Math-2-11-2.html
Image Analyst
Image Analyst 2022-12-10
See attached polyfit demo and make the obvious modifications to it to solve your problem.
In the meantime, see polyfit.
This looks like a homework problem. If you have any questions ask your instructor or read the link below to get started:
How do I get help on homework questions on MATLAB Answers? - MATLAB Answers - MATLAB Central
Obviously we can't give you the full solution because you're not allowed to turn in our code as your own.

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