how get it?

 a=magic(5)

a = 5×5

17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9

 b=[1 3 2 4 5]

b = 1×5

1 3 2 4 5

i want to get:

in 1 column i want to 1 element
in 2 column i want to 3 element
in 3 column i want to 2 element
in 4 column i want to 4 element
in 5 column i want to 5 element

ans:
 17  6  7  21 9

Answer 1

[Walter Roberson]

 a=magic(5)

a = 5×5

17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9

 b=[1 3 2 4 5]

b = 1×5

1 3 2 4 5

 v = a(sub2ind(size(a), b, 1:size(a,2)))

v = 1×5

17 6 7 21 9

Answer 2

[Torsten]

a = magic(5)

a = 5×5

17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9

b = [1 3 2 4 5]

b = 1×5

1 3 2 4 5

v = arrayfun(@(i)a(b(i),i),1:size(a,2))

v = 1×5

17 6 7 21 9