MATLAB Answers


Finding the x intercept

Asked by Darpan Verma on 10 Mar 2019
Latest activity Commented on by Darpan Verma on 10 Mar 2019
I have this curve fit plot. as shown in the figure below. How can I find at y = 0? as marked in the figure. This is a point where y = 0. I need a generalized code which can keep on finding value at y = 0 and keeps storing in a table.Screen Shot 2019-03-10 at 3.47.32 PM.png

  1 Comment

This is what I am doing now to find its value.
Screen Shot 2019-03-10 at 3.53.08 PM.png

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1 Answer

Answer by Walter Roberson
on 10 Mar 2019
 Accepted Answer

fitresult(1) is evaluating the model at x = 1, not extracting the first coefficient.
coeffs = coeffvalues(fitresult);
m = coeffs(1);
b = coeffs(2);
Yintercept = b;
Xintercept = -b/m;

  1 Comment

Thanks a lot Walter. That worked :) I really appreciate it.

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