3 papers
stat.ME2020
Log-concave Ridge Estimation
Christof Strähl
We develop a density ridge search algorithm based on a novel density ridge definition. This definition is based on a conditional variance matrix and the mode in the lower dimension…
math.ST2018
Local Estimation of a Multivariate Density and its Derivatives
Christof Strähl, Johanna F. Ziegel, Lutz Duembgen
We analyze four different approaches to estimate a multivariate probability density (or the log-density) and its first and second order derivatives. Two methods, local log-likeliho…
stat.ME2015
Cross-calibration of probabilistic forecasts
Christof Strähl, Johanna F. Ziegel
When providing probabilistic forecasts for uncertain future events, it is common to strive for calibrated forecasts, that is, the predictive distribution should be compatible with…