def test_initconst(self):
self.assertTrue(Chebfun.initconst(1, [-1,1]).isconst)
self.assertTrue(Chebfun.initconst(-10, np.linspace(-1,1,11)).isconst)
self.assertTrue(Chebfun.initconst(3, [-2,0,1]).isconst)
self.assertTrue(Chebfun.initconst(3.14, np.linspace(-100,-90,11)).isconst)
self.assertFalse(Chebfun([self.fun0]).isconst)
self.assertFalse(Chebfun([self.fun1]).isconst)
self.assertFalse(Chebfun([self.fun2]).isconst)
self.assertFalse(Chebfun([self.fun0, self.fun1]).isconst)
def test_initconst(self):
self.assertTrue(Chebfun.initconst(1, [-1,1]).isconst)
self.assertTrue(Chebfun.initconst(-10, linspace(-1,1,11)).isconst)
self.assertTrue(Chebfun.initconst(3, [-2,0,1]).isconst)
self.assertTrue(Chebfun.initconst(3.14, linspace(-100,-90,11)).isconst)
self.assertFalse(Chebfun([self.fun0]).isconst)
self.assertFalse(Chebfun([self.fun1]).isconst)
self.assertFalse(Chebfun([self.fun2]).isconst)
self.assertFalse(Chebfun([self.fun0, self.fun1]).isconst)
def chebfun(f=None, domain=None, n=None):
"""Chebfun constructor
"""
# chebfun()
if f is None:
return Chebfun.initempty()
domain = DefaultPrefs.domain if domain is None else domain
# chebfun(lambda x: f(x), ... )
if hasattr(f, "__call__"):
return _initfun(f, domain, n)
# chebfun('x', ... )
if isinstance(f, str) and len(f) is 1 and f.isalpha():
if n:
return _initfun(lambda x: x, domain, n)
else:
return Chebfun.initidentity(domain)
try:
# chebfun(3.14, ... ), chebfun('3.14', ... )
return Chebfun.initconst(float(f), domain)
except:
raise ValueError(f)
def chebfun(f=None, domain=None, n=None):
"""Chebfun constructor
"""
# chebfun()
if f is None:
return Chebfun.initempty()
domain = DefaultPrefs.domain if domain is None else domain
# chebfun(lambda x: f(x), ... )
if hasattr(f, "__call__"):
return Chebfun.initfun(f, domain, n)
# chebfun('x', ... )
if isinstance(f, str) and len(f) is 1 and f.isalpha():
if n:
return Chebfun.initfun(lambda x: x, domain, n)
else:
return Chebfun.initidentity(domain)
try:
# chebfun(3.14, ... ), chebfun('3.14', ... )
return Chebfun.initconst(float(f), domain)
except:
raise ValueError(f)
