Method
NumCosmoMathMSetCataloglargest_error
Declaration [src]
gdouble
ncm_mset_catalog_largest_error (
NcmMSetCatalog* mcat
)
Description [src]
This function calculates the largest proportional error of the parameters included, i.e., $\text{lre} = \sigma_{\hat{p}}/(|\hat{p}|\sqrt{n})$ where $n$ represents the number of samples in the catalog, $\hat{p}$ is the estimated mean of the parameter $p$ and $\sigma_{\hat{p}}$ its standard deviation.
It tries to guess when $p = 0$. In this case $\sigma_{\hat{p}} \approx |\hat{p}|\sqrt{n}$. Therefore, for $n > 10$, it tests if $\text{lre} \approx 1$ and, if it is the case, it returns $\text{lre} = \sigma_{\hat{p}}/\sqrt{n}$ instead.