|Syntax||MATTRN array1, array2|
The command MATTRN takes numeric arrays of two dimensions or string arrays of three dimensions and reads each row of array2, placing it in the corresponding column of array1.
It is obligatory that both arrays have the same type and are exactly DIMed to the needs of MATTRN.
The first dimension of array1 must be equal to the second of array2 and the first dimension of array2 must be equal to the second of array1.
For strings, additionally, the third dimensions of both arrays have to be equal:
DIM array1(x,y), array2(y,x) DIM array1%(x,y), array2%(y,x) DIM array1$(x,y,z), array2$(y,x,z)
So array1 and array2 can only be of identical dimensions for square matrices. In all other cases the contents of array1 are not modified.
100 DIM A%(2,3), B%(3,2) 110 MATRND B%,9: PRINT B%!\ 120 MATTRN A%,B%: PRINT A%!\ 130 MATTRN B%,A%: PRINT B%!\