MATLAB: How to Vecrorizing conditional vactor mapping problem

Question

Dear, A is a binary vector its values correspond to the number of times to repeat the corresponding number drawn from the vector B. 0 value in A means copying value from B to C while 1 value in A means representing the corresponding value in B by 3 bits.

as an example: A=[0 1 0 0 0 1]; B=[0 1 0 1 0 0]; C=[0 0 0 1 0 1 0 0 0 0] Can we avoid using classical loop? Regards

Answer 1

r=A.*3;

r(r==0)=1;

t1=repelem(B,r);

t2=repelem(A,r);

t3=t1.*t2;

t3=dec2bin(t3)'

c=regexprep(t3,'111','001');

c=c-'0';

c(t2==0)=t1(t2==0)

Results:

c =

0 0 0 1 0 1 0 0 0 0

Is there any faster execution?