def test_magnitude(self):
"""
"""
v = Vector(1, 1, 1)
m = v.magnitude
self.assertTrue(is_number(m))
self.assertEqual(m, np.sqrt(3))
def __init__(self, symbol, quantity, si_scale, validate=True):
"""
symbol: string
quantity: string
si_scale: number
"""
if validate is True:
assert(is_string(symbol))
assert(is_string(quantity))
assert(is_number(si_scale))
self._symbol = symbol
self._quantity = quantity
self._si_scale = si_scale
def round_to_significant(x, n=1, validate=True):
"""
Round number to significant figures.
"""
if validate is True:
assert(is_number(x))
assert(is_pos_integer_not_0(n))
round_to = -int(np.floor(np.log10(np.abs(x)))) + n-1
out = np.round(x, round_to)
if is_neg_integer(round_to):
out = int(out)
else:
out = float(out)
return out
def test_magnitude(self):
"""
"""
m = Vector(1, 1, 1).magnitude
self.assertTrue(is_number(m))
self.assertEqual(m, np.sqrt(3))
