Two vectors different from each other at least at two points

I want to compare two vectors and check whether they are different at least at two coordinates.

Answer 1

[jonas]

sum(abs(V1-V2)~=0)>=2

Will output 1 if they differ at two or more indices. You may want to set a tolerance if they are floating point numbers.

tol=0.01
sum(abs(V1-V2)>tol)>=2

[asim nadeem]

Thanks how can apply it on the rows of a matrix . I want to check if any two row vectors of a matrix satisfy this condition

[jonas]

If you remove the sum, then you will be left with a logical array where 1 represent indices with differing values. You can for example use

find(abs(V1-V2)>tol)