save 3 Matrix as two coloum matrices

Hi, My code has mtrix as mentioned I would like to use convexhull for this matrix f or that i need to store below matrix as two colom matrices.how do i save this data in 2 coloums.

    matpts=[setpts(1,1,:) setpts(1,2,:)];

matpts

   matpts

matpts(:,:,1) =

    -4.970886374019546   4.237487759841643

matpts(:,:,2) =

    -4.984744034584843   4.447834658981146

matpts(:,:,3) =

    -3.145339742390348  -0.801158546448830

matpts(:,:,4) =

    -4.486832980505138   1.837722339831622

matpts(:,:,5) =

    14.261961488692858   8.770420319005613

matpts(:,:,6) =

     1.875728478802678  -4.499417216957859

matpts(:,:,7) =

     3.910285866432918  -4.940448838312289

matpts(:,:,8) =

    14.403855973994119   8.401101706855462

matpts(:,:,9) =

      -5     5

matpts(:,:,10) =

      13    11

matpts(:,:,11) =

    14.928203230275509   6.196152422706632

Thanks, Sita

[sita]

    x=matpts(1,1,:)
    y=matpts(1,2,:)
    convhull(x(:),y(:))

worked for me