Multiplicities of (x,y) Points, e.g., for a Sunflower Plot
Given (x,y) points, determine their multiplicity -- checking for equality only up to some (crude kind of) noise. Note that this is special kind of 2D binning.
xyTable(x, y = NULL, digits)
A list with three components of same length,
- x coordinates, rounded and sorted.
- y coordinates, rounded (and sorted within
- multiplicities (positive integers); i.e.,
number[i]is the multiplicity of
xyTable(iris[, 3:4], digits = 6) ## Discretized uncorrelated Gaussian: require(stats) xy <- data.frame(x = round(sort(rnorm(100))), y = rnorm(100)) xyTable(xy, digits = 1)
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