How to compare two elements in an array with not equal operator(~=)?

for i=2:1:length(R)
    if(R(i)==R(i-1))
    else
        dif=[dif,R(i)];
    end
end

dif=[R(1)];

For example if my input is: [ 3 3 3] dif =dif =

    3.0000    3.0000

[madhan ravi]

What’s R ?

[Image Analyst]

Do you mean like

if R(i) ~= R(i-1)