How can I find the intersection point between 2 graphs?

Hi guys,

I would kindly like your help on how to find the intersection point between the yellow and blue line (at x=800), as shown below. It's probably very easy to solve, but I really have no clue how to get around this.

My code looks like this:

x = [0:10:5000]
y = Xumix1
g = Xumix2

k = [800 800]
l = [-5e6 4e6]

plot(x,y,x,g,k,l),xlabel('T'),ylabel('U'), legend('Umix1','Umix2')

Answer 1

[Star Strider]

Use the interp1 function:

x = [0:10:5000];
Xumix1 = 0.12 * x.^2;                        % Create Data
Intersect_y = interp1(x, Xumix1, 800)

Intersect_y =
       76800

I guessed at a function fo ‘Xumix1’ to illustrate the idea.

[may95]

That's amazing! ! Thank you so much :)

Intersect_y= interp1(x,y, 800)
Intersect_x= interp1(g,x,4500)


Intersect_y =

   3.7837e+05
   
Intersect_x =

   4.1946e+03

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!