Question: Combining different size matrices

Hi,

plot([[F(0,0.8)(y),y,y=0..3],[F(0.1,0.8)(y),y,y=0..3],[F(0.2,0.8)(y),y,y=0..3]],numpoints=25,color=[red,green,blue],view=[-0.3..0.5,0..2.5]);

p1:=%:

data:=plottools:-getdata~([p1]):

dm1:=op([1,-1],data);

              dm1 := Vector(4, {(1) = ` 36 x 2 `*Matrix,

                        (2) = `Data Type: `*float[8], (3) = `Storage: `*rectangular, (4) = `Order: `*Fortran_order})

dm2:=op([2,-1],data);

           dm2 := Vector(4, {(1) = ` 32 x 2 `*Matrix,

                    (2) = `Data Type: `*float[8], (3) = `Storage: `*rectangular, (4) = `Order: `*Fortran_order})

dm3:=op([3,-1],data);

                       dm3 := Vector(4, {(1) = ` 28 x 2 `*Matrix, (2) = `Data Type: `*float[8], (3) = `Storage:                                         `*rectangular, (4) = `Order: `*Fortran_order})

How to combine these three matrices into a single one with four columns (y, F(0,0.8)(y), F(0.1,0.8)(y), F(0.2,0.8)(y) )?

Thanks