how to find intersection point or value between two array????

I have two array as A and B, where,

A=[1.2222 1.2233 1.3344 1.3354 1.4354]
B=[1.1123 1.2234 1.3254 1.4892 1.5678]

I want 2nd element of A and B to intersect but as A's value is not exact equal to B i am not able to plot my graph. as, A's 2nd value is 1.2233 and B's 2nd value is 1.2234 which is almost equal so i want to put a condition as to search equality till 3rd value after decimal.

please please help me

Answer 1

[Matt J]

 AA=floor(A*1000);
 BB=floor(B*1000);

 find(AA==BB),

Answer 2

[Steven Lord]

Take a look at the ISMEMBERTOL and UNIQUETOL functions.

Answer 3

[Star Strider]

One possibility:

roundn = @(x,n) 10.^-n.*round(x.*10.^n);

A=[1.2222 1.2233 1.3344 1.3354 1.4354];
B=[1.1123 1.2234 1.3254 1.4892 1.5678];

ABI = intersect(roundn(A,3), roundn(B,3))

ABI =

       1.2230