Fix cookbook SaveFig() and create Multiplot.GetSubplot()

One small issue is an error I get using the “Multiplot” demo code on this page is that plt.Save results in the compiler saying that there is no definition or methods for Save. SaveFig does the job, but does not provide an overload to pass the plot dimensions. The dimensions are instead defined when the new plt object is created. I’m curious as to why there are two different methods? Could they be combined into one?

[StendProg]

Indexing starting at 1 looks unusual for c# users.

More perfect and simple solution is to store subplots at rectangle array initially.

public readonly Plot[,] subplots;
or
public readonly Plot[][] subplots;

Multiplot indexer overload can also give simple API:

var mp = new ScottPlot.MultiPlot(rows: 2, cols: 2);
mp[1, 2].Title("Random Points");

Not sure double indexer overload possible.

[swharden]

@StendProg done!

I won’t do the rectangular array because I want to make it slightly easier to support non-rectangular layouts if we decide to in the future. GetSubplot() will be easy to overload to add advanced features like this.

Thanks for both of your help on this one! I’ll release the next version on NuGet shortly