MATLAB: For loop

MATLAB

how to use 'for' in a nested loop and get a result quickly for example I write this code:
%%%%%%%%%%%%%%%%%%
Ac=reshape(Ac,1,[]);
Ac_estm=reshape(Ac_estm,1,[]);
P=size(Ac,2);
T=reshape(T,1,[]);
for(p=1:P)
 delta=d*Ac(p);
            if(T(p)==0)
                while(Ac(p)<=Ac_estm(p)-delta)
                    Ac(p)=Ac(p)-1;
                end
            else
                while(Ac(p)>=Ac_estm(p)+delta)
                    Ac(p)=Ac(p)+1;
                end
            end
end
%%%%%%%%%%%%%
but the execution is very slow and stops over the counter at 9
(T is logical and length(T)>= length(Ac) and length(Ac)=length(Ac_estm))

Best Answer

variant without loop
delta = d*Ac;
t = T==0;
R = Ac - Ac_estm; 
R1 = R + delta;
R2 =  R - delta;
t1 = sign(R1) <= 0;
t2 = sign(R2) >= 0;
Ac(t & t1) = Ac(t & t1) + ceil(abs(R1(t & t1)));%changed sign

Ac(~t & t2) = Ac(~t & t2) - ceil(abs(R2(~t & t2)));%changed sign
variant with loop
Ac=reshape(Ac,1,[]);
Ac_estm=reshape(Ac_estm,1,[]);
P=size(Ac,2);
T=reshape(T,1,[]);
for p=1:P
    delta=d*Ac(p);
    if T(p)==0
        t = Ac(p) - Ac_estm(p) + delta;
        t1 = t(t<=0);
    else
        t = Ac(p) - Ac_estm(p) - delta;
        t1 = t(t>=0);
    end
    Ac(p) = Ac(p) - sign(t1)*ceil(abs(t1));
end
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