How i can combine three or more than three matrix?

y=[repmat(x1,size(x2,1),1),repelem(x2,size(x1,1),1)];

I am writing this code for combining two matrix where the row number is different but column is same .

My question is how i can combine more than two matrix where their row number is differnt but column is same ?

Answer 1

[Stephen23]

Note that you will run out of memory very quickly as you increase the number of matrices.

format compact
inp = {rand(3,4),rand(4,4),rand(5,4)}; % all matrices in one cell array.
celldisp(inp)

inp{1} =
    0.3652    0.5458    0.7328    0.9886
    0.1774    0.4146    0.6908    0.7239
    0.5397    0.1625    0.8757    0.0996
inp{2} =
    0.4526    0.4298    0.2415    0.8247
    0.5996    0.3380    0.2754    0.7322
    0.2394    0.6964    0.4858    0.6903
    0.1400    0.8696    0.7921    0.3204
inp{3} =
    0.3385    0.7161    0.8820    0.6369
    0.9931    0.9668    0.0144    0.1382
    0.8860    0.5127    0.3950    0.9405
    0.0639    0.5230    0.1287    0.5097
    0.7254    0.0057    0.9713    0.4787

fun = @(m)1:size(m,1);
idr = cellfun(fun,inp,'uni',0);
[idr{:}] = ndgrid(idr{:}); % comma-separated lists
baz = @(m,r)m(r(:),:);
tmp = cellfun(baz,inp,idr,'uni',0);
out = horzcat(tmp{:})

out = 60×12

0.3652 0.5458 0.7328 0.9886 0.4526 0.4298 0.2415 0.8247 0.3385 0.7161 0.8820 0.6369 0.1774 0.4146 0.6908 0.7239 0.4526 0.4298 0.2415 0.8247 0.3385 0.7161 0.8820 0.6369 0.5397 0.1625 0.8757 0.0996 0.4526 0.4298 0.2415 0.8247 0.3385 0.7161 0.8820 0.6369 0.3652 0.5458 0.7328 0.9886 0.5996 0.3380 0.2754 0.7322 0.3385 0.7161 0.8820 0.6369 0.1774 0.4146 0.6908 0.7239 0.5996 0.3380 0.2754 0.7322 0.3385 0.7161 0.8820 0.6369 0.5397 0.1625 0.8757 0.0996 0.5996 0.3380 0.2754 0.7322 0.3385 0.7161 0.8820 0.6369 0.3652 0.5458 0.7328 0.9886 0.2394 0.6964 0.4858 0.6903 0.3385 0.7161 0.8820 0.6369 0.1774 0.4146 0.6908 0.7239 0.2394 0.6964 0.4858 0.6903 0.3385 0.7161 0.8820 0.6369 0.5397 0.1625 0.8757 0.0996 0.2394 0.6964 0.4858 0.6903 0.3385 0.7161 0.8820 0.6369 0.3652 0.5458 0.7328 0.9886 0.1400 0.8696 0.7921 0.3204 0.3385 0.7161 0.8820 0.6369

Answer 2

[KSSV]

y=cat(1,repmat(x1,size(x2,1),1),repelem(x2,size(x1,1),1));

Or

y=[repmat(x1,size(x2,1),1) ; repelem(x2,size(x1,1),1)];

[Akash Pal]

Thank you for giving the answer.But i did it already by myself .i asked if my matrix number is more than 2 or three.then what will be the procedure .

example a=3X4 ,b=4X4,c=5X4 then my output matrix should be y=60X12 ;

i want to form this type of matrix.

[KSSV]

Store the matrices into a cell and use cat.