How can I slove the maxtric

HI all, I'm not understanding how the code computes a C matrix . pls help me

i am a newbie...

A=[2;0;0;0;1]

B=[5;1;4;1]

C=A(B,1)

---> C=[ 1;2;0;2]

Answer 1

[John D'Errico]

You want to slove a matrix? Sorry. Valentines day was 3 days ago. Too late for s"love".

A is a column vector, composed of the elements [2 0 0 0 1].

B is a vector, used to index into the matrix (or vector) A.

What is the 5th element of A? Hint: Matlab uses a 1 based index system. So the 5th element of A is 1. Likewise, the 1st element of A is 1, etc.

[Tran David]

<3 thanks for your help.

Answer 2

[David Hill]

C is produced from indexing the values of B into A.

A(5)=1;A(1)=2;A(4)=0;A(1)=2;
C=A(B);%don't need the 1 

[Tran David]

I’m extremely grateful for you