How to get all combinations from this matrix?

Hello, everyone! Can someone help me with this? I want to use allcomb function for any matrix, any ideas how can I do this besides writing down every line of the vector?

ch=['MRWI'
    'IDMZ'
    'CGBI'
    'JKNO']
v=[];
[x,y]=size(ch);
allcomb(ch(1,:),ch(2,:),ch(3,:),ch(4,:))

[David Hill]

It is unclear what your expected output should be, show us your expected output.

[Robu Robert]

The output should be all possible combinations between letters of the rows, taken 1 from each row. I pasted down the correct output. My question is how to generalize allcomb(ch(1,:),ch(2,:),ch(3,:),ch(4,:)) to work for every input matrix.

'MICJ'

'MICK'

'MICN'

'MICO'

'MIGJ'

'MIGK'

'MIGN'

'MIGO'

'MIBJ'

'MIBK'

'MIBN'

'MIBO'

'MIIJ'

'MIIK'

'MIIN'

'MIIO'

'MDCJ'

'MDCK'

'MDCN'

'MDCO'

'MDGJ'

'MDGK'

'MDGN'

'MDGO'

'MDBJ'

'MDBK'

'MDBN'

'MDBO'

'MDIJ'

'MDIK'

'MDIN'

'MDIO'

'MMCJ'

'MMCK'

'MMCN'

'MMCO'

'MMGJ'

'MMGK'

'MMGN'

'MMGO'

'MMBJ'

'MMBK'

'MMBN'

'MMBO'

'MMIJ'

'MMIK'

'MMIN'

'MMIO'

'MZCJ'

'MZCK'

'MZCN'

'MZCO'

'MZGJ'

'MZGK'

'MZGN'

'MZGO'

'MZBJ'

'MZBK'

'MZBN'

'MZBO'

'MZIJ'

'MZIK'

'MZIN'

'MZIO'

'RICJ'

'RICK'

'RICN'

'RICO'

'RIGJ'

'RIGK'

'RIGN'

'RIGO'

'RIBJ'

'RIBK'

'RIBN'

'RIBO'

'RIIJ'

'RIIK'

'RIIN'

'RIIO'

'RDCJ'

'RDCK'

'RDCN'

'RDCO'

'RDGJ'

'RDGK'

'RDGN'

'RDGO'

'RDBJ'

'RDBK'

'RDBN'

'RDBO'

'RDIJ'

'RDIK'

'RDIN'

'RDIO'

'RMCJ'

'RMCK'

'RMCN'

'RMCO'

'RMGJ'

'RMGK'

'RMGN'

'RMGO'

'RMBJ'

'RMBK'

'RMBN'

'RMBO'

'RMIJ'

'RMIK'

'RMIN'

'RMIO'

'RZCJ'

'RZCK'

'RZCN'

'RZCO'

'RZGJ'

'RZGK'

'RZGN'

'RZGO'

'RZBJ'

'RZBK'

'RZBN'

'RZBO'

'RZIJ'

'RZIK'

'RZIN'

'RZIO'

'WICJ'

'WICK'

'WICN'

'WICO'

'WIGJ'

'WIGK'

'WIGN'

'WIGO'

'WIBJ'

'WIBK'

'WIBN'

'WIBO'

'WIIJ'

'WIIK'

'WIIN'

'WIIO'

'WDCJ'

'WDCK'

'WDCN'

'WDCO'

'WDGJ'

'WDGK'

'WDGN'

'WDGO'

'WDBJ'

'WDBK'

'WDBN'

'WDBO'

'WDIJ'

'WDIK'

'WDIN'

'WDIO'

'WMCJ'

'WMCK'

'WMCN'

'WMCO'

'WMGJ'

'WMGK'

'WMGN'

'WMGO'

'WMBJ'

'WMBK'

'WMBN'

'WMBO'

'WMIJ'

'WMIK'

'WMIN'

'WMIO'

'WZCJ'

'WZCK'

'WZCN'

'WZCO'

'WZGJ'

'WZGK'

'WZGN'

'WZGO'

'WZBJ'

'WZBK'

'WZBN'

'WZBO'

'WZIJ'

'WZIK'

'WZIN'

'WZIO'

'IICJ'

'IICK'

'IICN'

'IICO'

'IIGJ'

'IIGK'

'IIGN'

'IIGO'

'IIBJ'

'IIBK'

'IIBN'

'IIBO'

'IIIJ'

'IIIK'

'IIIN'

'IIIO'

'IDCJ'

'IDCK'

'IDCN'

'IDCO'

'IDGJ'

'IDGK'

'IDGN'

'IDGO'

'IDBJ'

'IDBK'

'IDBN'

'IDBO'

'IDIJ'

'IDIK'

'IDIN'

'IDIO'

'IMCJ'

'IMCK'

'IMCN'

'IMCO'

'IMGJ'

'IMGK'

'IMGN'

'IMGO'

'IMBJ'

'IMBK'

'IMBN'

'IMBO'

'IMIJ'

'IMIK'

'IMIN'

'IMIO'

'IZCJ'

'IZCK'

'IZCN'

'IZCO'

'IZGJ'

'IZGK'

'IZGN'

'IZGO'

'IZBJ'

'IZBK'

'IZBN'

'IZBO'

'IZIJ'

'IZIK'

'IZIN'

'IZIO'

Answer 1

[Bruno Luong]

ch=['MRWI'
'IDMZ'
'CGBI'
'JKNO'];

c=num2cell(ch,2);
[c{:}]=ndgrid(c{:});
n=size(c,1);
c = reshape(cat(n+1,c{:}),[],n)

c = 256×4 char array
    'MICJ'
    'RICJ'
    'WICJ'
    'IICJ'
    'MDCJ'
    'RDCJ'
    'WDCJ'
    'IDCJ'
    'MMCJ'
    'RMCJ'
    'WMCJ'
    'IMCJ'
    'MZCJ'
    'RZCJ'
    'WZCJ'
    'IZCJ'
    'MIGJ'
    'RIGJ'
    'WIGJ'
    'IIGJ'
    'MDGJ'
    'RDGJ'
    'WDGJ'
    'IDGJ'
    'MMGJ'
    'RMGJ'
    'WMGJ'
    'IMGJ'
    'MZGJ'
    'RZGJ'
    'WZGJ'
    'IZGJ'
    'MIBJ'
    'RIBJ'
    'WIBJ'
    'IIBJ'
    'MDBJ'
    'RDBJ'
    'WDBJ'
    'IDBJ'
    'MMBJ'
    'RMBJ'
    'WMBJ'
    'IMBJ'
    'MZBJ'
    'RZBJ'
    'WZBJ'
    'IZBJ'
    'MIIJ'
    'RIIJ'
    'WIIJ'
    'IIIJ'
    'MDIJ'
    'RDIJ'
    'WDIJ'
    'IDIJ'
    'MMIJ'
    'RMIJ'
    'WMIJ'
    'IMIJ'
    'MZIJ'
    'RZIJ'
    'WZIJ'
    'IZIJ'
    'MICK'
    'RICK'
    'WICK'
    'IICK'
    'MDCK'
    'RDCK'
    'WDCK'
    'IDCK'
    'MMCK'
    'RMCK'
    'WMCK'
    'IMCK'
    'MZCK'
    'RZCK'
    'WZCK'
    'IZCK'
    'MIGK'
    'RIGK'
    'WIGK'
    'IIGK'
    'MDGK'
    'RDGK'
    'WDGK'
    'IDGK'
    'MMGK'
    'RMGK'
    'WMGK'
    'IMGK'
    'MZGK'
    'RZGK'
    'WZGK'
    'IZGK'
    'MIBK'
    'RIBK'
    'WIBK'
    'IIBK'
    'MDBK'
    'RDBK'
    'WDBK'
    'IDBK'
    'MMBK'
    'RMBK'
    'WMBK'
    'IMBK'
    'MZBK'
    'RZBK'
    'WZBK'
    'IZBK'
    'MIIK'
    'RIIK'
    'WIIK'
    'IIIK'
    'MDIK'
    'RDIK'
    'WDIK'
    'IDIK'
    'MMIK'
    'RMIK'
    'WMIK'
    'IMIK'
    'MZIK'
    'RZIK'
    'WZIK'
    'IZIK'
    'MICN'
    'RICN'
    'WICN'
    'IICN'
    'MDCN'
    'RDCN'
    'WDCN'
    'IDCN'
    'MMCN'
    'RMCN'
    'WMCN'
    'IMCN'
    'MZCN'
    'RZCN'
    'WZCN'
    'IZCN'
    'MIGN'
    'RIGN'
    'WIGN'
    'IIGN'
    'MDGN'
    'RDGN'
    'WDGN'
    'IDGN'
    'MMGN'
    'RMGN'
    'WMGN'
    'IMGN'
    'MZGN'
    'RZGN'
    'WZGN'
    'IZGN'
    'MIBN'
    'RIBN'
    'WIBN'
    'IIBN'
    'MDBN'
    'RDBN'
    'WDBN'
    'IDBN'
    'MMBN'
    'RMBN'
    'WMBN'
    'IMBN'
    'MZBN'
    'RZBN'
    'WZBN'
    'IZBN'
    'MIIN'
    'RIIN'
    'WIIN'
    'IIIN'
    'MDIN'
    'RDIN'
    'WDIN'
    'IDIN'
    'MMIN'
    'RMIN'
    'WMIN'
    'IMIN'
    'MZIN'
    'RZIN'
    'WZIN'
    'IZIN'
    'MICO'
    'RICO'
    'WICO'
    'IICO'
    'MDCO'
    'RDCO'
    'WDCO'
    'IDCO'
    'MMCO'
    'RMCO'
    'WMCO'
    'IMCO'
    'MZCO'
    'RZCO'
    'WZCO'
    'IZCO'
    'MIGO'
    'RIGO'
    'WIGO'
    'IIGO'
    'MDGO'
    'RDGO'
    'WDGO'
    'IDGO'
    'MMGO'
    'RMGO'
    'WMGO'
    'IMGO'
    'MZGO'
    'RZGO'
    'WZGO'
    'IZGO'
    'MIBO'
    'RIBO'
    'WIBO'
    'IIBO'
    'MDBO'
    'RDBO'
    'WDBO'
    'IDBO'
    'MMBO'
    'RMBO'
    'WMBO'
    'IMBO'
    'MZBO'
    'RZBO'
    'WZBO'
    'IZBO'
    'MIIO'
    'RIIO'
    'WIIO'
    'IIIO'
    'MDIO'
    'RDIO'
    'WDIO'
    'IDIO'
    'MMIO'
    'RMIO'
    'WMIO'
    'IMIO'
    'MZIO'
    'RZIO'
    'WZIO'
    'IZIO'