problem indexing a matrix from arrays

I want matlab to return all the elements of p2 at rows r columns c, I tried p2(r,c), but that doesn't give me the right answer.

p2 =

    0.1500    0.1500
    0.4804    0.4804
    0.5098    0.5098
    0.0498    0.0498
    1.1008    1.1008
    1.0920    1.0920
    2.0219    2.0219
    1.1342    1.1342
    2.9643    2.9643
    3.8808    3.8808
    3.8487    3.8487
    4.9765    4.9765
    8.3789    8.3789
    7.7730    7.7730

r =

     3
     6
     7
     9
    10
    12
     3
     6
     7
     9
    10
    12

c =

     1
     1
     1
     1
     1
     1
     2
     2
     2
     2
     2
     2

>> p2(r,c)

ans =

Columns 1 through 5

    0.5098    0.5098    0.5098    0.5098    0.5098
    1.0920    1.0920    1.0920    1.0920    1.0920
    2.0219    2.0219    2.0219    2.0219    2.0219
    2.9643    2.9643    2.9643    2.9643    2.9643
    3.8808    3.8808    3.8808    3.8808    3.8808
    4.9765    4.9765    4.9765    4.9765    4.9765
    0.5098    0.5098    0.5098    0.5098    0.5098
    1.0920    1.0920    1.0920    1.0920    1.0920
    2.0219    2.0219    2.0219    2.0219    2.0219
    2.9643    2.9643    2.9643    2.9643    2.9643
    3.8808    3.8808    3.8808    3.8808    3.8808
    4.9765    4.9765    4.9765    4.9765    4.9765

Columns 6 through 10

    0.5098    0.5098    0.5098    0.5098    0.5098
    1.0920    1.0920    1.0920    1.0920    1.0920
    2.0219    2.0219    2.0219    2.0219    2.0219
    2.9643    2.9643    2.9643    2.9643    2.9643
    3.8808    3.8808    3.8808    3.8808    3.8808
    4.9765    4.9765    4.9765    4.9765    4.9765
    0.5098    0.5098    0.5098    0.5098    0.5098
    1.0920    1.0920    1.0920    1.0920    1.0920
    2.0219    2.0219    2.0219    2.0219    2.0219
    2.9643    2.9643    2.9643    2.9643    2.9643
    3.8808    3.8808    3.8808    3.8808    3.8808
    4.9765    4.9765    4.9765    4.9765    4.9765

Columns 11 through 12

    0.5098    0.5098
    1.0920    1.0920
    2.0219    2.0219
    2.9643    2.9643
    3.8808    3.8808
    4.9765    4.9765
    0.5098    0.5098
    1.0920    1.0920
    2.0219    2.0219
    2.9643    2.9643
    3.8808    3.8808
    4.9765    4.9765

I should be getting this:

        0.5098
        1.092
        2.0219
        2.9643
        3.8808
        4.9765
        0.5098
        1.092
        2.0219
        2.9643
        3.8808
        4.9765

Answer 1

[Azzi Abdelmalek]

p2(sub2ind(size(p2),r,c))