Esempi in Python per sign

Esempio n. 1

File: minmod.py Progetto: shyams2/Bolt

def minmod(x, y, z):

    min_of_all = af.minof(af.minof(af.abs(x),af.abs(y)), af.abs(z))

    # af.sign(x) = 1 for x<0 and sign(x) for x>0:
    signx = 1 - 2 * af.sign(x)
    signy = 1 - 2 * af.sign(y)
    signz = 1 - 2 * af.sign(z)
    
    result = 0.25 * af.abs(signx + signy) * (signx + signz) * min_of_all

    af.eval(result)
    return result

Esempio n. 2

File: nn_arrayFire.py Progetto: lhd231/Distributive_Neural_Net

def gradient(nn, delta):
 
    nabla_b = []
    nabla_w = []

    # output
    dact = nn['nonlin'][-1][1]
    t = nn['zs'][-1]
   
    asdf = dact(2)
    
    #This is d_relu.  It is a binary output
    dW = average_gradient(delta*af.sign(1e-5 - nn['zs'][-1]), nn['activations'][-2])
    nabla_b.append(af.mean(delta))
    nabla_w.append(dW)

    for i in range(len(nn['weights']) - 2, -1, -1):
        dact = delta * af.max(nn['zs'][i+1])
	trans = nn['weights'][i+1].T
        delta = af.matmul(trans, dact)


        dW = average_gradient(delta,nn['activations'][i])
        nabla_b.append(af.mean(delta*af.max(nn['zs'][i])))
        nabla_w.append(dW)
    return nabla_w, nabla_b

Esempio n. 3

def gradient(nn, delta):

    nabla_b = []
    nabla_w = []

    # output
    dact = nn['nonlin'][-1][1]
    t = nn['zs'][-1]

    asdf = dact(2)

    #This is d_relu.  It is a binary output
    dW = average_gradient(delta * af.sign(1e-5 - nn['zs'][-1]),
                          nn['activations'][-2])
    nabla_b.append(af.mean(delta))
    nabla_w.append(dW)

    for i in range(len(nn['weights']) - 2, -1, -1):
        dact = delta * af.max(nn['zs'][i + 1])
        trans = nn['weights'][i + 1].T
        delta = af.matmul(trans, dact)

        dW = average_gradient(delta, nn['activations'][i])
        nabla_b.append(af.mean(delta * af.max(nn['zs'][i])))
        nabla_w.append(dW)
    return nabla_w, nabla_b

Esempio n. 4

File: regularizers.py Progetto: shwetadwip-chowdhury/multi-layer-born

 def _softThreshold(self, x):
     if type(x).__module__ == "arrayfire.array":
         #POTENTIAL BUG: af.sign implementation does not agree with documentation
         x = (af.sign(x) - 0.5) * (-2.0) * (af.abs(x) - self.parameter) * (
             af.abs(x) > self.parameter)
     else:
         x = np.sign(x) * (np.abs(x) -
                           self.parameter) * (np.abs(x) > self.parameter)
     return x

Esempio n. 5

File: arith.py Progetto: syurkevi/arrayfire-python

def simple_arith(verbose = False):
    display_func = _util.display_func(verbose)
    print_func   = _util.print_func(verbose)

    a = af.randu(3,3,dtype=af.Dtype.u32)
    b = af.constant(4, 3, 3, dtype=af.Dtype.u32)
    display_func(a)
    display_func(b)

    c = a + b
    d = a
    d += b

    display_func(c)
    display_func(d)
    display_func(a + 2)
    display_func(3 + a)


    c = a - b
    d = a
    d -= b

    display_func(c)
    display_func(d)
    display_func(a - 2)
    display_func(3 - a)

    c = a * b
    d = a
    d *= b

    display_func(c * 2)
    display_func(3 * d)
    display_func(a * 2)
    display_func(3 * a)

    c = a / b
    d = a
    d /= b

    display_func(c / 2.0)
    display_func(3.0 / d)
    display_func(a / 2)
    display_func(3 / a)

    c = a % b
    d = a
    d %= b

    display_func(c % 2.0)
    display_func(3.0 % d)
    display_func(a % 2)
    display_func(3 % a)

    c = a ** b
    d = a
    d **= b

    display_func(c ** 2.0)
    display_func(3.0 ** d)
    display_func(a ** 2)
    display_func(3 ** a)

    display_func(a < b)
    display_func(a < 0.5)
    display_func(0.5 < a)

    display_func(a <= b)
    display_func(a <= 0.5)
    display_func(0.5 <= a)

    display_func(a > b)
    display_func(a > 0.5)
    display_func(0.5 > a)

    display_func(a >= b)
    display_func(a >= 0.5)
    display_func(0.5 >= a)

    display_func(a != b)
    display_func(a != 0.5)
    display_func(0.5 != a)

    display_func(a == b)
    display_func(a == 0.5)
    display_func(0.5 == a)

    display_func(a & b)
    display_func(a & 2)
    c = a
    c &= 2
    display_func(c)

    display_func(a | b)
    display_func(a | 2)
    c = a
    c |= 2
    display_func(c)

    display_func(a >> b)
    display_func(a >> 2)
    c = a
    c >>= 2
    display_func(c)

    display_func(a << b)
    display_func(a << 2)
    c = a
    c <<= 2
    display_func(c)

    display_func(-a)
    display_func(+a)
    display_func(~a)
    display_func(a)

    display_func(af.cast(a, af.Dtype.c32))
    display_func(af.maxof(a,b))
    display_func(af.minof(a,b))
    display_func(af.rem(a,b))

    a = af.randu(3,3) - 0.5
    b = af.randu(3,3) - 0.5

    display_func(af.abs(a))
    display_func(af.arg(a))
    display_func(af.sign(a))
    display_func(af.round(a))
    display_func(af.trunc(a))
    display_func(af.floor(a))
    display_func(af.ceil(a))
    display_func(af.hypot(a, b))
    display_func(af.sin(a))
    display_func(af.cos(a))
    display_func(af.tan(a))
    display_func(af.asin(a))
    display_func(af.acos(a))
    display_func(af.atan(a))
    display_func(af.atan2(a, b))

    c = af.cplx(a)
    d = af.cplx(a,b)
    display_func(c)
    display_func(d)
    display_func(af.real(d))
    display_func(af.imag(d))
    display_func(af.conjg(d))

    display_func(af.sinh(a))
    display_func(af.cosh(a))
    display_func(af.tanh(a))
    display_func(af.asinh(a))
    display_func(af.acosh(a))
    display_func(af.atanh(a))

    a = af.abs(a)
    b = af.abs(b)

    display_func(af.root(a, b))
    display_func(af.pow(a, b))
    display_func(af.pow2(a))
    display_func(af.exp(a))
    display_func(af.expm1(a))
    display_func(af.erf(a))
    display_func(af.erfc(a))
    display_func(af.log(a))
    display_func(af.log1p(a))
    display_func(af.log10(a))
    display_func(af.log2(a))
    display_func(af.sqrt(a))
    display_func(af.cbrt(a))

    a = af.round(5 * af.randu(3,3) - 1)
    b = af.round(5 * af.randu(3,3) - 1)

    display_func(af.factorial(a))
    display_func(af.tgamma(a))
    display_func(af.lgamma(a))
    display_func(af.iszero(a))
    display_func(af.isinf(a/b))
    display_func(af.isnan(a/a))

    a = af.randu(5, 1)
    b = af.randu(1, 5)
    c = af.broadcast(lambda x,y: x+y, a, b)
    display_func(a)
    display_func(b)
    display_func(c)

    @af.broadcast
    def test_add(aa, bb):
        return aa + bb

    display_func(test_add(a, b))

Esempio n. 6

def simple_arith(verbose=False):
    display_func = _util.display_func(verbose)
    print_func = _util.print_func(verbose)

    a = af.randu(3, 3)
    b = af.constant(4, 3, 3)
    display_func(a)
    display_func(b)

    c = a + b
    d = a
    d += b

    display_func(c)
    display_func(d)
    display_func(a + 2)
    display_func(3 + a)

    c = a - b
    d = a
    d -= b

    display_func(c)
    display_func(d)
    display_func(a - 2)
    display_func(3 - a)

    c = a * b
    d = a
    d *= b

    display_func(c * 2)
    display_func(3 * d)
    display_func(a * 2)
    display_func(3 * a)

    c = a / b
    d = a
    d /= b

    display_func(c / 2.0)
    display_func(3.0 / d)
    display_func(a / 2)
    display_func(3 / a)

    c = a % b
    d = a
    d %= b

    display_func(c % 2.0)
    display_func(3.0 % d)
    display_func(a % 2)
    display_func(3 % a)

    c = a**b
    d = a
    d **= b

    display_func(c**2.0)
    display_func(3.0**d)
    display_func(a**2)
    display_func(3**a)

    display_func(a < b)
    display_func(a < 0.5)
    display_func(0.5 < a)

    display_func(a <= b)
    display_func(a <= 0.5)
    display_func(0.5 <= a)

    display_func(a > b)
    display_func(a > 0.5)
    display_func(0.5 > a)

    display_func(a >= b)
    display_func(a >= 0.5)
    display_func(0.5 >= a)

    display_func(a != b)
    display_func(a != 0.5)
    display_func(0.5 != a)

    display_func(a == b)
    display_func(a == 0.5)
    display_func(0.5 == a)

    a = af.randu(3, 3, dtype=af.Dtype.u32)
    b = af.constant(4, 3, 3, dtype=af.Dtype.u32)

    display_func(a & b)
    display_func(a & 2)
    c = a
    c &= 2
    display_func(c)

    display_func(a | b)
    display_func(a | 2)
    c = a
    c |= 2
    display_func(c)

    display_func(a >> b)
    display_func(a >> 2)
    c = a
    c >>= 2
    display_func(c)

    display_func(a << b)
    display_func(a << 2)
    c = a
    c <<= 2
    display_func(c)

    display_func(-a)
    display_func(+a)
    display_func(~a)
    display_func(a)

    display_func(af.cast(a, af.Dtype.c32))
    display_func(af.maxof(a, b))
    display_func(af.minof(a, b))
    display_func(af.rem(a, b))

    a = af.randu(3, 3) - 0.5
    b = af.randu(3, 3) - 0.5

    display_func(af.abs(a))
    display_func(af.arg(a))
    display_func(af.sign(a))
    display_func(af.round(a))
    display_func(af.trunc(a))
    display_func(af.floor(a))
    display_func(af.ceil(a))
    display_func(af.hypot(a, b))
    display_func(af.sin(a))
    display_func(af.cos(a))
    display_func(af.tan(a))
    display_func(af.asin(a))
    display_func(af.acos(a))
    display_func(af.atan(a))
    display_func(af.atan2(a, b))

    c = af.cplx(a)
    d = af.cplx(a, b)
    display_func(c)
    display_func(d)
    display_func(af.real(d))
    display_func(af.imag(d))
    display_func(af.conjg(d))

    display_func(af.sinh(a))
    display_func(af.cosh(a))
    display_func(af.tanh(a))
    display_func(af.asinh(a))
    display_func(af.acosh(a))
    display_func(af.atanh(a))

    a = af.abs(a)
    b = af.abs(b)

    display_func(af.root(a, b))
    display_func(af.pow(a, b))
    display_func(af.pow2(a))
    display_func(af.sigmoid(a))
    display_func(af.exp(a))
    display_func(af.expm1(a))
    display_func(af.erf(a))
    display_func(af.erfc(a))
    display_func(af.log(a))
    display_func(af.log1p(a))
    display_func(af.log10(a))
    display_func(af.log2(a))
    display_func(af.sqrt(a))
    display_func(af.cbrt(a))

    a = af.round(5 * af.randu(3, 3) - 1)
    b = af.round(5 * af.randu(3, 3) - 1)

    display_func(af.factorial(a))
    display_func(af.tgamma(a))
    display_func(af.lgamma(a))
    display_func(af.iszero(a))
    display_func(af.isinf(a / b))
    display_func(af.isnan(a / a))

    a = af.randu(5, 1)
    b = af.randu(1, 5)
    c = af.broadcast(lambda x, y: x + y, a, b)
    display_func(a)
    display_func(b)
    display_func(c)

    @af.broadcast
    def test_add(aa, bb):
        return aa + bb

    display_func(test_add(a, b))

Esempio n. 7

af.display(-a)
af.display(+a)
af.display(~a)
af.display(a)

af.display(af.cast(a, af.c32))
af.display(af.maxof(a, b))
af.display(af.minof(a, b))
af.display(af.rem(a, b))

a = af.randu(3, 3) - 0.5
b = af.randu(3, 3) - 0.5

af.display(af.abs(a))
af.display(af.arg(a))
af.display(af.sign(a))
af.display(af.round(a))
af.display(af.trunc(a))
af.display(af.floor(a))
af.display(af.ceil(a))
af.display(af.hypot(a, b))
af.display(af.sin(a))
af.display(af.cos(a))
af.display(af.tan(a))
af.display(af.asin(a))
af.display(af.acos(a))
af.display(af.atan(a))
af.display(af.atan2(a, b))

c = af.cplx(a)
d = af.cplx(a, b)

Esempio n. 8

File: simple_arith.py Progetto: PierreBizouard/arrayfire-python

af.display(-a)
af.display(+a)
af.display(~a)
af.display(a)

af.display(af.cast(a, af.c32))
af.display(af.maxof(a,b))
af.display(af.minof(a,b))
af.display(af.rem(a,b))

a = af.randu(3,3) - 0.5
b = af.randu(3,3) - 0.5

af.display(af.abs(a))
af.display(af.arg(a))
af.display(af.sign(a))
af.display(af.round(a))
af.display(af.trunc(a))
af.display(af.floor(a))
af.display(af.ceil(a))
af.display(af.hypot(a, b))
af.display(af.sin(a))
af.display(af.cos(a))
af.display(af.tan(a))
af.display(af.asin(a))
af.display(af.acos(a))
af.display(af.atan(a))
af.display(af.atan2(a, b))

c = af.cplx(a)
d = af.cplx(a,b)