本文整理汇总了Python中classy.Class.get_transfer方法的典型用法代码示例。如果您正苦于以下问题：Python Class.get_transfer方法的具体用法？Python Class.get_transfer怎么用？Python Class.get_transfer使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类classy.Class的用法示例。
在下文中一共展示了Class.get_transfer方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: ComputeTransferData
# 需要导入模块: from classy import Class [as 别名]
# 或者: from classy.Class import get_transfer [as 别名]
def ComputeTransferData(settings, redshift):
database_key = settings.copy()
database_key.update({'redshift': tuple(redshift)})
database = Database.Database(config.DATABASE_DIR)
if database_key in database:
return database[database_key], redshift
else:
cosmo = Class()
cosmo.set(settings)
cosmo.compute()
outputData = [cosmo.get_transfer(z) for z in redshift]
# Calculate d_g/4+psi
for transfer_function_dict in outputData:
transfer_function_dict["d_g/4 + psi"] = transfer_function_dict["d_g"]/4 + transfer_function_dict["psi"]
# Now filter the relevant fields
fields = TRANSFER_QUANTITIES + ["k (h/Mpc)"]
outputData = [{field: outputData[i][field] for field in fields} for i in range(len(redshift))]
database[database_key] = outputData
return outputData, redshift示例2: background_tau_at_mr
# 需要导入模块: from classy import Class [as 别名]
# 或者: from classy.Class import get_transfer [as 别名]
#
tau_eq = background_tau_at_mr(1.)
tau_lambda = background_tau_at_lm(1.)
#
# check and inform user whether intiial arbitrary choice of z_max_pk was OK
max_z_needed = background_z_at_tau(tau[0])
if max_z_needed > z_max_pk:
print 'you must increase the value of z_max_pk to at least ',max_z_needed
() + 1 # this strange line is just a trick to stop the script execution there
else:
print 'in a next run with the same values of tau, you may decrease z_max_pk from ',z_max_pk,' to ',max_z_needed
#
# get transfer functions at each time and build arrays Theta0(tau,k) and phi(tau,k)
#
for i in range(tau_num):
one_time = M.get_transfer(background_z_at_tau(tau[i])) # transfer functions at each time tau
if i ==0: # if this is the first time in the loop: create the arrays (k, Theta0, phi)
k = one_time['k (h/Mpc)']
k_num = len(k)
Theta0 = np.zeros((tau_num,k_num))
phi = np.zeros((tau_num,k_num))
Theta0[i,:] = 0.25*one_time['d_g'][:]
phi[i,:] = one_time['phi'][:]
#
# find the global extra of Theta0(tau,k) and phi(tau,k), used to define color code later
#
Theta_amp = max(Theta0.max(),-Theta0.min())
phi_amp = max(phi.max(),-phi.min())
#
# reshaping of (k,tau) necessary to call the function 'pcolormesh'
#示例3: int
# 需要导入模块: from classy import Class [as 别名]
# 或者: from classy.Class import get_transfer [as 别名]
#print derived.viewkeys()
z_rec = derived['z_rec']
z_rec = int(1000.*z_rec)/1000. # round down at 4 digits after coma
M.struct_cleanup() # clean output
M.empty() # clean input
#
# call CLASS again (will compute transfer functions at inout value z_rec)
#
M = Class()
M.set(common_settings)
M.set({'z_pk':z_rec})
M.compute()
#
# load transfer functions at recombination
#
one_time = M.get_transfer(z_rec)
print one_time.viewkeys()
k = one_time['k (h/Mpc)']
Theta0 = 0.25*one_time['d_g']
phi = one_time['phi']
psi = one_time['psi']
theta_b = one_time['t_b']
# compute related quantitites
R = 3./4.*M.Omega_b()/M.Omega_g()/(1+z_rec) # R = 3/4 * (rho_b/rho_gamma) at z_rec
zero_point = -(1.+R)*psi # zero point of oscillations: -(1.+R)*psi
#
# get Theta0 oscillation amplitude (for vertical scale of plot)
#
Theta0_amp = max(Theta0.max(),-Theta0.min())
#
# use table of background quantitites to find the wavenumbers corresponding to