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Algorithmically, you can think of this as a tensor product of 2 2x2 matrices. In code, you could represent this as
```for my \$a (0,1) {
for my \$b (0,1) {
for my \$i (0,1) {
for my \$j (0,1) {
my \$row = 2*\$a + \$i;
my \$col = 2*\$b + \$j;
print "  element \$i,\$j => matrix coord \$row, \$col\n";
}
}
}
}
If you wanted to convert in the opposite direction, just use the inverse equations:
```for my \$row (0..3) {
for my \$col (0..3) {
print "  Element ", \$row % 2,',', \$col % 2,"\n";
}
}

-Mark

In reply to Re: Iterating over Blocks of 2-Dim Array by kvale
in thread Iterating over Blocks of 2-Dim Array by Kozz

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