This package provides functions for plotting pseudo-Hilbert curves in treemaps. A Hilbert curve maps one dimensional space into two dimensions while minimising the two-dimensional distance between points that were adjacent in one dimension. A Hilbert curve must be plotted inside a square with side lengths equal to a power of 2. A pseudo-Hilbert curve can be plotted in a rectangle with slight penalties to the minimised distances. A treemap displays hierarchical data as a set of nested rectangles. Each branch of the tree is given a rectangle, which is then tiled with smaller rectangles representing sub-branches. A leaf node's rectangle has an area proportional to a specified dimension of the data.

To get a vanilla Hilbert curve use the `hilbert`

function.

```
par(mar = rep(0, 4), xaxs = 'i', yaxs = 'i')
plot(hilbert(128), type='l')
```

To get a pseudo-Hilbert curve use the `pseudo.hilbert`

function.

```
par(mar = rep(0, 4), xaxs = 'i', yaxs = 'i')
plot(pseudo.hilbert(162, 100), type='l')
```

To see an example of a pseudo-Hilbert curve in a treemap run the demo

childsish/hilbert-in-treemap documentation built on June 10, 2017, 6:29 p.m.

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