def __truediv__(self, other):
"""Implements division between Variables.
See __add__ for reference.
"""
if isinstance(other, ReverseVariable):
if not isinstance(other.val, float):
raise ValueError("Vector cannot be the denominator!")
if close(other.val, 0):
raise ValueError("Divided by 0!")
out_val = self.val / other.val
res = ReverseVariable(out_val)
self.children.append(res)
other.children.append(res)
res.left = self
res.leftgrad = 1.0 / other.val
res.right = other
res.rightgrad = -self.val / (other.val ** 2)
return res
else:
new_val = get_right_shape(other)
if not isinstance(new_val, float):
raise ValueError("Vector cannot be the denominator!")
if close(new_val, 0):
raise ValueError("Divided by 0!")
out_val = self.val / new_val
res = ReverseVariable(out_val)
self.children.append(res)
res.left = self
res.leftgrad = 1.0 / new_val
return res
def __eq__(self, other):
#TODO-DOC about this
if isinstance(other, Variable):
if close(self.val, other.val) and close(self.grad, other.grad):
return True
else:
return False
else:
new_val = get_right_shape(other)
if close(self.val, new_val) and close(self.grad, get_right_shape(np.zeros(self.grad.shape))):
return True
else:
return False
def get_val(self, x):
if not isinstance(x, float):
raise ValueError("Cannot be a vector!")
tmp = (x - np.pi / 2) / np.pi
if close(tmp, round(tmp)):
raise ValueError("Value not in the domain!")
return np.tan(x)
def __rtruediv__(self, other):
"""Implements division between other objects and Variables.
See __add__ for reference.
"""
new_val = get_right_shape(other)
if not isinstance(self.val, float):
raise ValueError("Vector cannot be the denominator!")
if close(self.val, 0):
raise ValueError("Divided by 0!")
out_val = new_val / self.val
res = ReverseVariable(out_val)
self.children.append(res)
res.left = self
res.leftgrad = -new_val / (self.val ** 2)
return res
def get_val(self, x):
for t in x.flatten():
tmp = (t - np.pi / 2) / np.pi
if close(tmp, round(tmp)):
raise ValueError("Value not in the domain!")
return np.tan(x)