Crate gsdesign 

Group sequential design

This crate ports the canonical Simpson grid construction and density update algorithms from the original R gsDesign implementations to Rust.

Structs

DensityGrid

Density grid used for recursive convolution across interim analyses.

IntegrationGrid

Grid produced by Simpson’s rule on the canonical normal scale.

Enums

IntegrationError

Error type reported by numerical integration routines.

Functions

gridpts

Construct Simpson’s rule grid points for canonical normal integration.

h1

Initialize the density grid for the first group sequential analysis.

hupdate

Update the density grid for a subsequent group sequential analysis.