To catch correct jump and store the number

Hi I want to record the up and down count of the signal when it satisfies my threshold condition but the code is not working. I need to catch the jumps shown by red in the image. I have attached the image as well as my code so can anyone solve it sooner. Thank you for your help!

phi(1)=0.66702; phi(2)= 0.667003; phidc(1)=0;phidc(2)= 0.00001;

for n=2:10^5 ;

p= 0.5.*rand-0.25; q = 1.*rand -0.5 ;

phi(n+1)= 0.0031+ 1.9676*phi(n) -0.9686*phi(n-1)- 0.0039*cos( 0.5*phidc(n))* sin(phi(n)) + 0.0390* q ;

phidc(n+1)= 1.8873*phidc(n) -0.9686*phidc(n-1)- 0.0079*sin(0.5*phidc(n))* cos(phi(n)) + 4*0.0390* p ;

if phi(n+1)> 4.5 && phi(n)< 4.5 ;

count1= count1+1 ;

UP(count1)= n;

if phi(n+1)< 1.5 && phi(n)> 1.5 ;

count0= count0+1 ;

DOWN(count0)= n;

end

end

end

[Star Strider]

DUPLICATE POST —

Digitization of noisy signal

[suman Dhamala]

Hi, Star Strider Basically, I am looking for an alternative method. I want to catch up the jump while my code is running. Can you find a way for this code?

[Star Strider]

You will likely have to do that in hardware, for example with a Schmitt trigger (link).

It might be possible to do that in real-time. I have no real-time Toolboxes, so I have no experience with that.

[suman Dhamala]

The code is very simple. I am not getting an idea to use two if loop in a correct way I guess