"Source: Text/Basics/Mat.text";
"Line: 817";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Basics/Mat.text, line: 817
// Example: H27E4 ()
print "Example: H27E4";
ei := GetEchoInput();
SetEchoInput(true);
X := Matrix(4, [1,2,3,4, 5,4,3,2, 1,2,3,4]);
X;
X[1];
X[1, 2];
assert $1 eq 2;
X[1, 2] := 23;
X;
X[3] := Vector([9,8,7,6]);
X[2] := 0;
X;
SetEchoInput(ei);
