How to extract value from a matrix with given indices

Hi there,I have a an array of index and a matrix such as

index = [2 4 3 1 5];
matrix = [5 2 5 3 4;
          1 2 4 2 6;
          7 5 0 9 3;
          6 6 3 1 2;
          3 6 8 2 7];

How can I extract the value from each column of the matrix with the given index to obtain a new array such as

new = [1 6 0 3 7];

Thanks.

-Shin-

Answer 1

[Dyuman Joshi]

index = [2 4 3 1 5];
matrix = [5 2 5 3 4;
          1 2 4 2 6;
          7 5 0 9 3;
          6 6 3 1 2;
          3 6 8 2 7];
s=size(matrix);
new=matrix(sub2ind(s,index,1:s(2)))

new = 1×5

1 6 0 3 7

[Shin]

Hi Dyuman Joshi, thanks for solution, it works well too, more simplify way.

Answer 2

[Abhinav]

index = [2 4 3 1 5];
matrix = [5 2 5 3 4;
          1 2 4 2 6;
          7 5 0 9 3;
          6 6 3 1 2;
          3 6 8 2 7];
      new=[];
      for i=1:length(index)
          new(i)=matrix(index(i),i);
      end
      new

[Shin]

Hi Abhinav, thank for the solution, however the code only display the last value with is "new = 7" in this case. After I modify a little on your code and I'm able to get all the value. Code as below.

index = [2 4 3 1 5];
matrix = [5 2 5 3 4;
          1 2 4 2 6;
          7 5 0 9 3;
          6 6 3 1 2;
          3 6 8 2 7];

indexNO = 5;
new = zeros(1,indexNO);
for i = 1:indexNO
  new(1,i) = matrix(index(i),i);
end
new

Anyway, thanks again for you solution.

Answer 3

[prasanth s]

code example is

ind = sub2ind(size(matrix),index,1:5);
new=matrix(ind)

[Shin]

Hi Prasanth, thanks for your solution too, works as well, appreciate it.