Plot method for the class 'curve_set2d', i.e. two-dimensional functions
## S3 method for class 'curve_set2d'plot(x, idx =1, ncol =2+1*(length(idx)==3),...)
Arguments
x: An curve_set2d object
idx: Indices of 2d functions to plot.
ncol: The maximum number of columns for the figures. Default 2 or 3, if the length of x equals 3. (Relates to the number of curve_sets that have been combined.)