randomfield¶
This package provides utilities for efficient generation of random fields for cosmology.
Reference/API¶
randomfield.generate Module¶
High-level functions to generate random fields.
Classes¶
Generator(nx, ny, nz, grid_spacing_Mpc_h[, ...]) |
Manage random field generation for a specified geometry. |
Class Inheritance Diagram¶
randomfield.lensing Module¶
Utilities for weak lensing calculations.
Functions¶
calculate_correlation_function(Delta2, ell, ...) |
Transform a function of ell into a function of angular separation. |
calculate_lensing_weights(cosmology, z[, ...]) |
Calculate the geometric weights for lensing. |
calculate_shear_power(DC, DA, weights, variances) |
Calculate the shear power spectrum as a function of source position. |
tabulate_3D_variances(ell, DA, growth, power) |
Tabulate 3D matter-power contributions to shear power variances. |
randomfield.cosmotools Module¶
Calculate cosmological quantities.
Functions¶
apply_lognormal_transform(delta, growth[, sigma]) |
Transform delta values drawn from a normal distribution with mean zero and standard deviation sigma to have a log-normal distribution with mean one and standard deviation growth * sigma. |
calculate_power(cosmology, k_min, k_max[, ...]) |
Calculate the power spectrum P(k,z) over the range k_min <= k <= k_max. |
create_cosmology(*args, **kwargs) |
Create a background cosmology model. |
get_class_parameters(cosmology) |
Get CLASS parameters corresponding to an astropy cosmology model. |
get_growth_function(cosmology, redshifts) |
Calculate the growth function. |
get_mean_matter_densities(cosmology, redshifts) |
Calculate mean densities in g / cm**3. |
get_redshifts(cosmology, data, spacing[, ...]) |
Calculate the redshift grid. |
randomfield.powertools Module¶
Utilities for working with tabulated power spectra.
Functions¶
create_ksq_grids(data, spacing, packed) |
|
fill_with_log10k(data, spacing[, packed]) |
Fill an array with values of log10(k). |
filter_power(power, sigma[, out]) |
Apply a Gaussian filtering to a power spectrum. |
get_k_bounds(data, spacing[, packed]) |
Return the bounds of wavenumber values for the specified grid. |
load_default_power([scaled_by_h]) |
Loads a default power spectrum P(k,z=0). |
tabulate_sigmas(data, power, spacing[, packed]) |
Replace an array of log10(k) values with the corresponding sigmas. |
validate_power(power) |
Validates a power spectrum. |
randomfield.transform Module¶
Provide a uniform interface to numpy.fft and pyfftw transforms.
Functions¶
allocate(shape, dtype[, use_pyfftw]) |
Allocate a contiguous block of un-initialized typed memory. |
complex_type(scalar_type) |
Determine the complex type corresponding to a component scalar type. |
expanded_shape(data[, packed]) |
Determine the expanded shape of a 3D array. |
is_hermitian(data[, packed, rtol, atol]) |
Test if a 3D field is Hermitian. |
scalar_type(complex_type) |
Determine the type of the real and imaginary parts of a complex type. |
symmetrize(data[, packed]) |
Symmetrize a complex 3D field so that its inverse FFT is real valued. |
Classes¶
Plan(shape[, dtype_in, data_in, overwrite, ...]) |
A plan for performing fast Fourier transforms on a single buffer. |
Class Inheritance Diagram¶
