def piecewise_constant(domain=[-1, 0, 1], values=[0, 1]):
"""Initlialise a piecewise constant Chebfun"""
funs = []
intervals = [x for x in Domain(domain).intervals]
for interval, value in zip(intervals, values):
funs.append(Bndfun.initconst(value, interval))
return Chebfun(funs)
def test_const_construction(self):
subinterval = Interval()
ff = Bndfun.initconst(1., subinterval)
self.assertEquals(ff.size, 1)
self.assertTrue(ff.isconst)
self.assertFalse(ff.isempty)
self.assertRaises(ValueError, Bndfun.initconst, [1.], subinterval)
def pwc(domain=[-1,0,1], values=[0,1]):
"""Initialise a piecewise-constant Chebfun"""
funs = []
intervals = [x for x in Domain(domain).intervals]
for interval, value in zip(intervals, values):
funs.append(Bndfun.initconst(value, interval))
return Chebfun(funs)
def test_const_construction(self):
subinterval = Interval()
ff = Bndfun.initconst(1., subinterval)
self.assertEquals(ff.size, 1)
self.assertTrue(ff.isconst)
self.assertFalse(ff.isempty)
self.assertRaises(ValueError, Bndfun.initconst, [1.], subinterval)
def test_const(self):
ff = Bndfun.initconst(0., Interval(-2, 3))
gg = Bndfun.initconst(2., Interval(-2, 3))
self.assertEquals(ff.roots().size, 0)
self.assertEquals(gg.roots().size, 0)
def test_const(self):
ff = Bndfun.initconst(0., Interval(-2,3))
gg = Bndfun.initconst(2., Interval(-2,3))
self.assertEquals(ff.roots().size, 0)
self.assertEquals(gg.roots().size, 0)
