Method
NumCosmoMathPowspeccorr3d
Declaration [src]
gdouble
ncm_powspec_corr3d (
NcmPowspec* powspec,
NcmModel* model,
const gdouble reltol,
const gdouble z,
const gdouble r
)
Description [src]
Computes the spatial correlation function in configuration space at redshift $z$ and position $r$,
$$\xi(r,z) = \frac{1}{2\pi^2} \int_{k_{\mathrm{min}}}^{k_\mathrm{max}} P(k,z) \, j_{0}(kr) \, k^2 \, \mathrm{d}k \, ,$$
where, $j_0(t)$ is the zero order spherical Bessel function of the first kind.
This function is recommended for a small set of $r$ and $z$ values.
For a wide range of values it is best to apply NcmPowspecCorr3d, instead.
Parameters
model-
Type:
NcmModelA
NcmModel.The argument can be NULL.The data is owned by the caller of the method. reltol-
Type:
const gdoubleRelative tolerance for integration.
z-
Type:
const gdoubleThe value of $z$.
r-
Type:
const gdoubleThe value of $r$.