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| Syntax |
(exp:end)matrix(exp, exp:end)matrix(exp:end, exp)
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| See Also | vector indices , non-sequential access |
end is used as part of an
index expression
,
it refers to the maximum index in the vector or
matrix being referenced.
end when only one index is specified.
If you enter
x = {5., 4., 3., 2.}
x(2 :: end)
O-Matrix will respond
{
4
3
2
}
If you continue by entering
x(1 :: end - 1)
O-Matrix will respond
{
5
4
3
}
You can also use end when assigning a value to a subvector.
If you continue by entering
x = x'
x(end - 1 :: end) = [0, 0]
print x
O-Matrix will respond
[ 5 , 4 , 0 , 0 ]
end when two indices are specified.
If you enter
x = {[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]}
x(2::end, :)
O-Matrix will respond
{
[ 5 , 6 , 7 , 8 ]
[ 9 , 10 , 11 , 12 ]
}
If you continue by entering
x(:, 1 :: end - 2)
O-Matrix will respond
{
[ 1 , 2 ]
[ 5 , 6 ]
[ 9 , 10 ]
}
If you then enter
x(2 :: end, 1 :: end - 2)
O-Matrix will respond
{
[ 5 , 6 ]
[ 9 , 10 ]
}
end when assigning a value to a submatrix.
If you continue the previous example by entering
x(end - 1 :: end, end - 1 :: end) = {[0, 0], [0, 0]}
print x
O-Matrix will respond
{
[ 1 , 2 , 3 , 4 ]
[ 5 , 6 , 0 , 0 ]
[ 9 , 10 , 0 , 0 ]
}