In the past we've discussed what it would take to support plotting more types of data than double[]. @StendProg posted an excellent summary of options in #103 (comment) which led to support for generic types in SignalConst (#100). It may be time to consider adding collection support to scatter plots. David Hary raised this topic in an email today. Here are my thoughts currently:

Usage

List<int> xs = new List<int> {1, 2, 3};
List<double> ys = new List<double> {1.5, 3.0, 4.5};

var plt = new ScottPlot.Plot();
plt.PlotScatter(xs, ys);

Implementation

• Xs and Ys would become ICollection<T>
• Scatter plots would convert Xs and Ys to double[] at in the Render and GetLimits methods.
  Generics cant easily be compared (e.g., >), but converting to double[] solves this problem.

Cons

• Conversion to array takes time. However, Scatter plots are already not performant, and they are intended only for small numbers of data points, so this conversion will be very fast.
• Xs and Ys must be size-checked on every render. Mismatch would throw errors on render, rather than on instantiation.

Pros

• Xs and Ys could be different types, such as List<int> and List<float>
• Xs and Ys could change number of points between renders
• This change could be made to be non-breaking to the Plot module, with an extra overload to support collections