Python random.normalvariate函数代码示例

def generate_messy_data():
    data_1 = [(random.normalvariate(MESSY_MEAN_X_1, MESSY_STD_X_1),
               random.normalvariate(MESSY_MEAN_Y_1, MESSY_STD_Y_1)) for i in range(500)]
    data_2 = [(random.normalvariate(MESSY_MEAN_X_2, MESSY_STD_X_2),
               random.normalvariate(MESSY_MEAN_Y_2, MESSY_STD_Y_2)) for i in range(500)]

    return data_1, data_2, (data_1 + data_2)

 def test_003_test_message_with_noise(self):
     NUM_GENERATED_PASSES = 5
     N0 = 0.06
     
     # get strider decoder
     dec = rf.codes.strider.StriderFactory.createDecoder(1530)
     
     # get turbo encoder
     enc = rf.codes.strider.StriderFactory.createEncoder(1530)
     
     for i in xrange(2):
         # get random message
         message = numpy.random.bytes(6179)
         message += (chr(numpy.random.randint(0,4) & 0x3))
         # encode
         enc.setPacket(message)
         encoderOutput = rf.vector_csymbol()
         enc.encode(3840*NUM_GENERATED_PASSES, encoderOutput)
 
         # Add noise
         sigma = math.sqrt(N0 / 2.0)
         for i in xrange(encoderOutput.size()):
             encoderOutput[i] += random.normalvariate(0,sigma) 
             encoderOutput[i] += 1j * random.normalvariate(0,sigma) 
         
         # attempt to decode
         dec.reset()
         dec.add(encoderOutput,N0)
         res = dec.decode()
         
         self.assertEqual(len(res.packet), len(message))
         self.assertEqual(res.packet, message)

def test_te_local_values():
    """Test local TE estimation."""
    n = 1000
    cov = 0.4
    source = [rn.normalvariate(0, 1) for r in range(n)]  # correlated src
    target = [0] + [
        sum(pair)
        for pair in zip(
            [cov * y for y in source[0 : n - 1]],
            [(1 - cov) * y for y in [rn.normalvariate(0, 1) for r in range(n - 1)]],
        )
    ]
    analysis_opts = {
        "kraskov_k": 4,
        "normalise": "false",
        "theiler_t": 0,
        "noise_level": 1e-8,
        "local_values": True,
        "tau_target": 1,
        "tau_source": 1,
        "source_target_delay": 1,
        "history_target": 1,
        "history_source": 1,
    }
    te_est = Estimator_te("jidt_kraskov")
    te_res = te_est.estimate(np.array(source), np.array(target), analysis_opts)
    assert te_res.shape[0] == n, "Local TE estimator did not return an array."

def makeMeasAccToPlan_lognorm(func, expplan:list, b:list, c:dict, Ve=None, n=1, outfilename="", listOfOutvars=None):
    """
    :param func: векторная функция
    :param expplan: план эксперимента (список значений вектора x)
    :param b: вектор b
    :param c: вектор c
    :param Ve: ковариационная матрица (np.array)
    :param n: объём выборки y
    :param outfilename: имя выходного файла, куда писать план
    :param listOfOutvars: список выносимых переменных
    :return: список экспериментальных данных в формате списка словарей 'x':..., 'y':...
    """
    res = list()

    for i in range(len(expplan)):
        y=func(expplan[i],b,c)
        if y is None: #если функция вернула чушь, то в measdata её не записывать!
            continue
        #Внесём возмущения:
        if Ve is not None:
            if np.linalg.det(Ve)>10e-15:
                ydisps=np.diag(Ve)
                for k in range(len(y)):
                    if (y[k]<0):
                        y[k]=-1*math.exp(random.normalvariate(math.log(math.fabs(y[k])), math.sqrt(ydisps[k])))
                    else:
                        y[k]=math.exp(random.normalvariate(math.log(y[k]), math.sqrt(ydisps[k])))

        curdict = {'x':expplan[i], 'y':y}
        #res[i]["y"]=y
        res.append(curdict)
    return res

def generate_hypothesis(x_mean, y_mean, th_mean, x_sdev, y_sdev, th_sdev):
    """
    Generate a gausian hypothesis
    """
    return(random.normalvariate(x_mean,  x_sdev), 
           random.normalvariate(y_mean,  y_sdev), 
           random.normalvariate(th_mean, th_sdev))

def test_cmi_no_c_estimator_ocl():
    """Tests CMI estimation without a condional variable

    The estimator should fall back to MI estiamtion and provide the correct result
    """
    n = 4001 # This needs to be odd as we loose one sample when shifting signals
    cov = 0.4
    source_1 = [rn.normalvariate(0, 1) for r in range(n)]  # correlated src
    target = [sum(pair) for pair in zip(
        [cov * y for y in source_1],
        [(1 - cov) * y for y in [rn.normalvariate(0, 1) for r in range(n)]])]
    # Cast everything to numpy so the idtxl estimator understands it.
    source_1 = np.expand_dims(np.array(source_1), axis=1)
    target = np.expand_dims(np.array(target), axis=1)
    # Note that the calculation is a random variable (because the generated
    # data is a set of random variables) - the result will be of the order of
    # what we expect, but not exactly equal to it; in fact, there will be a
    # large variance around it.

    # opts = {'kraskov_k': 4, 'normalise': True, 'nchunkspergpu': 2}
    opts = {'kraskov_k': 4, 'normalise': True}
    n_chunks = 2
    calculator_name = 'opencl_kraskov'
    est = Estimator_cmi(calculator_name)
    res_1 = est.estimate(var1=source_1[1:], var2=target[1:],
                         conditional=None, n_chunks=n_chunks, opts=opts)
    expected_res = math.log(1 / (1 - math.pow(cov, 2)))
    print('Example 1: TE result for second chunk is {0:.4f} nats;'
          ' expected to be close to {1:.4f} nats for these correlated'
          ' Gaussians.'.format(res_1[0], expected_res))
    assert(res_1[0] != res_1[1]), ('CMI results for chunk 1 and 2 are'
                                   'identical, this  is unlikely for random'
                                   'data.')

 def _determine_personality_feature(self, feature_type):
     """Determine a value for a Big Five personality trait."""
     config = self.person.game.config
     feature_will_get_inherited = (
         self.person.biological_mother and
         random.random() < config.big_five_heritability_chance[feature_type]
     )
     if feature_will_get_inherited:
         # Inherit this trait (with slight variance)
         takes_after = random.choice([self.person.biological_father, self.person.biological_mother])
         feature_value = random.normalvariate(
             self._get_a_persons_feature_of_type(person=takes_after, feature_type=feature_type),
             config.big_five_inheritance_sd[feature_type]
         )
     else:
         takes_after = None
         # Generate from the population mean
         feature_value = random.normalvariate(
             config.big_five_mean[feature_type], config.big_five_sd[feature_type]
         )
     if feature_value < config.big_five_floor:
         feature_value = config.big_five_floor
     elif feature_value > config.big_five_cap:
         feature_value = config.big_five_cap
     feature_object = Feature(value=feature_value, inherited_from=takes_after)
     return feature_object

def main(argv=None):
    n = 1000000
    if argv is None:
        argv = sys.argv
    try:
        try:
            opts, args = getopt.getopt(argv[1:], "hn:", ["help","npts="])
        except getopt.error, msg:
            raise Usage(msg)
        for o, a in opts:
            if o in ("-h","--help"):
                print "Usage: data.py --npts=Npts"
                return 2
            if o in ("-n","--npts"):
                n = int(a)
            else:
                raise Usage()

        # y_A ~ 2*x + 0.1 + N(0,0.5)
        # y_B ~ 4*x - 0.1 + N(0,0.5)
        # x ~ (-1,1)
        labels  = ['A','B']
        bcoeffs = [ 2 , 4 ]
        acoeffs = [+.1,-.1]
        x = -1 + 1./n
        for i in range(n):
            which = random.randint(0,1)
            noise = random.randint(0,10000)
            if noise == 1:
                print labels[which],"\t",x,"\t",random.normalvariate(0,0.5)+ \
                                                     1000.+bcoeffs[which]*x+acoeffs[which]
            else:
                print labels[which],"\t",x,"\t",random.normalvariate(0,0.5)+ \
                                                     bcoeffs[which]*x+acoeffs[which]
            x = x + 2./n

    def animate(self, graph):
        # If we're new, start in the middle
        if self.position is None:
            self.position = Numeric.array(graph.viewport.size, Numeric.Float)/2

        # Slowly fade in
        if self.opacity < 1:
            self.opacity += 0.01

        if not self.isGrabbed:
            # Forces don't apply if we're being grabbed

            # Stay away from other nodes
            for other in graph.nodes:
                if other.position:
                    repulsionForce(self, other, 80)

            # Stay away from the viewport edges
            edgeStrength = 200
            for axis in (0,1):
                self.position[axis] += edgeStrength / max(self.position[axis], 1)
                self.position[axis] -= edgeStrength / max(graph.viewport.size[axis] - self.position[axis], 1)

            # Random wandering
            self.position += (random.normalvariate(0, graph.temperature),
                              random.normalvariate(0, graph.temperature))

def main():
  f = ROOT.TFile.Open('input.root','recreate')

  nom = ROOT.TH1F('nominal_histo','nominal_histo',2,0,2)
  up = ROOT.TH1F('syst_up','syst_up',2,0,2)
  dn = ROOT.TH1F('syst_down','syst_down',2,0,2)

  
  nom.SetBinContent(1,10)
  nom.SetBinContent(2,20)
  nom.Sumw2(0)
  nom.Write()

  up.SetBinContent(1,12)
  up.SetBinContent(2,24)
  up.Sumw2(0)
  up.Write()

  dn.SetBinContent(1,8)
  dn.SetBinContent(2,16)
  dn.Sumw2(0)
  dn.Write()

  data1 = ROOT.TH1F('data1','data1',2,0,2)
  data1.SetBinContent(1,10.2)
  data1.SetBinContent(2,19.7)
  data1.Sumw2(0)
  data1.Write()

  data2 = ROOT.TH2F('data2','data2',6,-3,3,6,-3,3)
  for i in xrange(10000):
    data2.Fill(random.normalvariate(0,1),random.normalvariate(0,1))
  data2.Sumw2(0)
  data2.Write()
  f.Close()

def testFuc():
    import random
    import time
    import pylab
    plot=True
    
    points=[]
    # create three random 2D gaussian clusters
    for i in range(8):
        x=random.random()*3
        y=random.random()*3
        c=[scipy.array((x+random.normalvariate(0,0.1), y+random.normalvariate(0,0.1))) for j in range(100)]
        points+=c

    if plot: pylab.scatter([x[0] for x in points], [x[1] for x in points])

    random.shuffle(points)
    n=len(points)
    start=time.time()
    # the value of N is generally quite forgiving, i.e.
    # giving 6 will still only find the 3 clusters.
    # around 10 it will start finding more
    c=OnlineCluster(8)
    while len(points)>0: 
        c.onlineCluster(points.pop())
    clusters=c.clusters
    #print ("I clustered %d points in %.2f seconds and found %d clusters."%(n, time.time()-start, len(clusters)))
    if plot: 
        cx=[x.center[0] for x in clusters]
        cy=[y.center[1] for y in clusters]
    
        pylab.plot(cx,cy,"ro")
        pylab.draw()
        pylab.show() 

 def placement(self, mode):
     if (mode == "manual"):
         # requires 2 values: x and y
         if (self.info == None or len(self.info) == 0):
             self.x = 0
             self.y = 0
         else:
             self.x = self.info[0]
             if (len(self.info) >= 1):
                 self.y = self.info[1]
             else:
                 self.y = self.x
     if (mode == "random"):
         # requires 4 values: size_x, size_y, offset_x, offset_y
         #if self.info == None or len(self.info) == 0:
         #   size_x, size_y = 100, 100
         #   offset_x, offset_y = 0, 0
         #else:
         size_x = self.info[0]
         size_y = self.info[1]
         offset_x = self.info[2]
         offset_y = self.info[3]
         self.x = random.random()*size_x + offset_x
         self.y = random.random()*size_y + offset_y
     if (mode == "cluster"):
         # requires 4 values: center_x, center_y, spread_x, spread_y
         center_x = self.info[0]
         center_y = self.info[1]
         spread_x = self.info[2]
         spread_y = self.info[3]
         self.x = random.normalvariate(center_x, spread_x) 
         self.y = random.normalvariate(center_y, spread_y)

 def generate_candidate(self,mu,sigma):
     # randomly generate a candidate value from the proposal distribution
     if self.method=="independent":
         candidate = random.normalvariate(mu,sigma) # proposed move
     elif self.method=="random_walk":
         candidate = self.chain[i] + random.normalvariate(mu,sigma) # proposed move
     return candidate

def random_clusters(imagedir, category, make_faces=False):
    """Creates a test mockup of random clusters from a folder of images
    Returns:
       clusters: a list of clusters that can be JSONified and passed to the
       html renderer
    """
    image_extensions = set(['jpg', 'png', 'jpeg', 'gif', 'ico'])
    local_images = [os.path.splitext(x)[0]
                    for x in sorted(os.listdir(imagedir))
                    if os.path.splitext(x)[1][1:] in image_extensions]
    local_images = [make_image(h, category, make_faces) for h in local_images]

    clusters = []

    n_clusters = max(int(random.normalvariate(6,2)),2)

    # TODO add cluster children to simulate HAC

    for i in range(n_clusters):
        n_images = random.randrange(4,7)
        n_size = random.randrange(40,60)
        cluster = {'all_images': random.sample(local_images, n_size),
                   'sample_images': random.sample(local_images, n_images),
                   'std': random.normalvariate(10.0,2.0),
                   'position': (random.random(), random.random()),
                   'size': n_size,
                   'children': []}
        clusters.append(cluster)
    return clusters

def run_ens(xi,yi,zi,ens_num,stepCnt,dt):
    x = []
    y = []
    z = []

    for t in range(ens_num):
        
        xs = np.empty((stepCnt + 1,))
        ys = np.empty((stepCnt + 1,))
        zs = np.empty((stepCnt + 1,))
    
        # Setting initial values
        mean = 0
        sdev = .5
        xs[0], ys[0], zs[0] = (xi+random.normalvariate(mean, sdev), 
                               yi+random.normalvariate(mean, sdev), 
                               zi+random.normalvariate(mean, sdev))

        for i in range(stepCnt) :
            x_dot, y_dot, z_dot = lorenz(xs[i], ys[i], zs[i])
            xs[i + 1] = xs[i] + (x_dot * dt)
            ys[i + 1] = ys[i] + (y_dot * dt)
            zs[i + 1] = zs[i] + (z_dot * dt)

        x.append(xs)
        y.append(ys)
        z.append(zs)

    return x,y,z