Plot B-spline and its polynomial pieces
pp = bspline(t)
bspline(t) plots the B-spline
with knot sequence t, as well as the polynomial
pieces of which it is composed.
the plotting in the subplot window specified by window;
see the MATLAB® command subplot for details.
pp = bspline(t) plots nothing
but returns the ppform of the B-spline.
The statement pp=fn2fm(spmak(t,1),'pp') has
the same effect as the statement pp=bspline(t).
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