Deleting Some Specific Entries from a vector

I have vectors xa and yb. I want to write the entries of yb to xa which are not the ones -1,0,1,0.6,-0.6,0.8,-0.8

I apply this one

 xa=yb(yb~=1);
 xa=xa(xa~=-1);
 xa=xa(xa~=0);
 xa=xa(xa~=0.6);
 xa=xa(xa~=-0.6);
 xa=xa(xa~=-0.8);
 xa=xa(xa~=0.8);

But it just deletes -1,0 and 1. Not 0.6,-0.6,0.8,-0.8. Where do you think the problem is? Or how can I change it?

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Wan Ji]

Just do with the following

q = abs(yb);
p = (q==0|q==1|q==0.6|q==0.8);
xa = yb(~p)

if it does not work, use a tolerance TOL

TOL = 1e-5
q = abs(yb);
p = (q<=TOL|abs(q-1)<=TOL|abs(q-0.6)<=TOL|abs(q-0.8)<=TOL);
xa = yb(~p)