def __new__(cls, nu, symbol=None):
nu = sympify(nu)
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = 1 / (sqrt(nu) * beta_fn(S(1) / 2, nu / 2)) * (1 + x**2 / nu)**(
-(nu + 1) / 2)
obj = SingleContinuousPSpace.__new__(cls, x, pdf)
return obj
def __new__(cls, name, nu):
nu = sympify(nu)
x = Symbol(name)
pdf = 1 / (sqrt(nu) * beta_fn(S(1) / 2, nu / 2)) * (1 + x**2 / nu)**(
-(nu + 1) / 2)
obj = SingleContinuousPSpace.__new__(cls, x, pdf)
return obj
def __new__(cls, alpha, beta, symbol=None):
alpha, beta = sympify(alpha), sympify(beta)
_value_check(alpha > 0, "Alpha must be positive")
_value_check(beta > 0, "Beta must be positive")
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = x**(alpha-1) * (1-x)**(beta-1) / beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set=Interval(0, 1))
obj.alpha = alpha
obj.beta = beta
return obj
def __new__(cls, alpha, beta, symbol=None):
alpha, beta = sympify(alpha), sympify(beta)
_value_check(alpha > 0, "Alpha must be positive")
_value_check(beta > 0, "Beta must be positive")
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = x**(alpha - 1) * (1 - x)**(beta - 1) / beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set=Interval(0, 1))
obj.alpha = alpha
obj.beta = beta
return obj
def __new__(cls, nu, symbol = None):
nu = sympify(nu)
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = 1/(sqrt(nu)*beta_fn(S(1)/2,nu/2))*(1+x**2/nu)**(-(nu+1)/2)
obj = SingleContinuousPSpace.__new__(cls, x, pdf)
return obj
def dict(self):
n, a, b = self.n, self.alpha, self.beta
n = as_int(n)
return dict(
(k, binomial(n, k) * beta_fn(k + a, n - k + b) / beta_fn(a, b))
for k in range(0, n + 1))
def __new__(cls, name, alpha, beta):
alpha, beta = sympify(alpha), sympify(beta)
x = Symbol(name)
pdf = x**(alpha - 1)*(1 + x)**(-alpha - beta)/beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set=Interval(0, oo))
return obj
def __new__(cls, name, nu):
nu = sympify(nu)
x = Symbol(name)
pdf = 1/(sqrt(nu)*beta_fn(S(1)/2, nu/2))*(1 + x**2/nu)**(-(nu + 1)/2)
obj = SingleContinuousPSpace.__new__(cls, x, pdf)
return obj
def __new__(cls, alpha, beta, symbol=None):
alpha, beta = sympify(alpha), sympify(beta)
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = x**(alpha - 1) * (1 + x)**(-alpha - beta) / beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set=Interval(0, oo))
return obj
def pdf(self, x):
alpha, beta = self.alpha, self.beta
return x**(alpha - 1) * (1 - x)**(beta - 1) / beta_fn(alpha, beta)
def __new__(cls, name, alpha, beta):
alpha, beta = sympify(alpha), sympify(beta)
x = Symbol(name)
pdf = x**(alpha-1)*(1+x)**(-alpha-beta)/beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set = Interval(0, oo))
return obj
def pdf(self, x):
d1, d2 = self.d1, self.d2
return (2*d1**(d1/2)*d2**(d2/2) / beta_fn(d1/2, d2/2) *
exp(d1*x) / (d1*exp(2*x)+d2)**((d1+d2)/2))
def pdf(self, x):
d1, d2 = self.d1, self.d2
return (sqrt((d1*x)**d1*d2**d2 / (d1*x+d2)**(d1+d2))
/ (x * beta_fn(d1/2, d2/2)))
def pdf(self, x):
alpha, beta = self.alpha, self.beta
return x**(alpha - 1)*(1 + x)**(-alpha - beta)/beta_fn(alpha, beta)
def __new__(cls, alpha, beta, symbol=None):
alpha, beta = sympify(alpha), sympify(beta)
x = symbol or SingleContinuousPSpace.create_symbol()
pdf = x**(alpha-1)*(1+x)**(-alpha-beta)/beta_fn(alpha, beta)
obj = SingleContinuousPSpace.__new__(cls, x, pdf, set = Interval(0, oo))
return obj
def pmf(self, k):
n, a, b = self.n, self.alpha, self.beta
return binomial(n, k) * beta_fn(k + a, n - k + b) / beta_fn(a, b)
def pdf(self, x):
nu = self.nu
return 1/(sqrt(nu)*beta_fn(S(1)/2, nu/2))*(1 + x**2/nu)**(-(nu + 1)/2)
