plq_plotMultiple — Piecewise linear quadratic (plq), plot multiple functions
plq_plotMultiple(x1, x5, f1, ..., fN)
number, optional. The lower x bound of the grid on which the functions are plotted.
number, optional. The upper x bound of the grid on which the functions are plotted.
matrix. The plq functions to plot.
Plots a number of PLQ functions computed over the interval [x1,x5]. If x1 or x5 are not provided, or are -%inf and %inf respectively, then they default to -5 and 5.
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