MATLAB: How to remove for loop in the following code that change the entries of a given vector

for loopMATLABvectorizationvectors

Hello, I am trying to vectorize the following simple code
if true
A=[-1;3;0;-4];
B=zeros(size(A));
for i=1:4
  if A(i)<0
      B(i)=-(A(i));
  elseif A(i)==0
      B(i)=1;
  else
      B(i)=A(i);
  end
  B=B(:);
end  
end
Please, how do I write the above code in such a way that there is no for loop, and still it works?

Best Answer

Try this:
A=[-1;3;-2;-4];
B = A;
B(A<0) = -A(A<0)
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