Free Access

Fig. 2


Relative error ϵ in the first derivative of linear functions calculated in 2D as a function of the smoothing length. Upper rows depict the value of ϵ for ρ(x,y) = (1 + x) g cm-3 obtained using the Gaussian (left) and the cubic spline (right) kernels. Bottom rows are the same but for the function  g cm-3. Error profiles with crosses are for the direct derivative estimation.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.