Find intersection between two curves (2024)

Hello sir , thank you for the detailed explanations i did try but did not got the intersections

Please post the code you have tried and explain, what "did not get" mean.

What is a meaningul range for searching for intersections? exp(x) is growing very fast, while sin(x) lives inside [-1, +1]. So maybe:

Then you could start the search for the zeros of @(x) exp(x) - sin(x) at e.g. -3 - these are the two inputs for fzero().

x = linspace(-4*pi, pi, 1000);

y1 = exp(x);

y2 = sin(x);

figure

plot(x, y1, 'b', x, y2, 'g');

x1=y1 -y2;

fzero = (x1,-3);

i did try it like this,but im getting some errors

Please post the error message, if you mention an error.

fzero is a function. You have to provide a function as 1st input:

@Star Strider: What a pitty that you have deleted your answer. It was a valuable addition to my answer: You have considered the situation, that the input data are provided as vectors, while I suggested a method, when they are functions.

If somebody searchs in the forum for "intersection between two curves", your answer might have been more suiting then my one.

Your answers are too valuable to be deleted. They are useful and do not impede the readers.

I thought of unselecting my answer and accepting yours to keep it in the forum. But this cannot be a general strategy.

Hi guys! I need to find the intersection between two curves but one of them is given as vectors (experimental data). Could you please help me with that? Thank you in advance!

Is interpolating the measurement data by a spline curve, taking the difference of the two so created curves and searching for a zero of this difference function an option ?