After comma precision tracking for if statement

I am having this number a=85.0093792283283 calculated in the code and I want to compare with another similar value something like this b=85.0093791964294. My question I just want to compare first 3 digit after the comma. Is there way to implement this in the example code?

if(a == b)
    disp('Number are equal');
end

Answer 1

[Alan Stevens]

Here's one possibility

a=85.0093792283283;
b=85.0093791964294;

a = floor(a*10^3);
b = floor(b*10^3);
if a==b
    disp('numbers are equal')
end

[Ibrahim A]

Does something like this also work?

if round(a,4) == round(b,4)

[Jan]

@Ibrahim A: Yes, round is better for your problem.