Description Usage Arguments Value Examples
h(t) = (-1)^(t-1) * x(t), 1 <= t <= length(x)
1 | quadlength(x)
|
x |
2-d image; dim(n,n), n = 2^J (hopefully). |
n
length(x).
J
least power of two greater than n.
1 | quadlength(matrix(1:16,ncol=4))
|
$x
[1] 4
$y
[1] 2
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