Drawing scatterplots and sunflower pots with R

Scatter plot and sunflower plots differ only in that the latter draws a flower stem for each repeat of a data point. In other words, it is easy to see multipicities of data points hidden in a plain scatter plot. Points are compared up to a specified number of significant digits.

Here are examples of plain scatter plot and sunflower plots for the same data (two column xy coordinates)


1 3
1 3
1 4
1.5 4
1.5 4
1.5 4
1.75 5
1.75 1.25
2 5
2 6
2 6
2 6
2 6
2 6
2 8


Here is the scatter plot drawn for the above data. Count the points drawn with the points in the data. They don't match!

On the other hand, the sunflower plot will allow a viewer most of the time an idea of the number of points displayed in the graph. Here is the sunflower plot for the same data.

Our solver which offers a scatterplot/sunflower plot generation page is in
http://extreme.adorio-research.org/solvers/rplotpage/scatter/