find_zeros_cross: Find first zeros

In jpkeller/spconf: Computing Scales of Spatial Smoothing for Confounding Adjustment

Find first zeros

Description

For each column of smoothing matrix, determines smallest distance that corresponds with a negative smoothing weight

Usage

find_first_zero_cross(x)

find_zeros_cross(D, S)

Arguments

x	Function values, assumed to be ordered
D	Distance matrix, or a subset of columns from a distance matrix.
S	Smoothing matrix, or a subset of columns from a smoothing matrix.

Value

Index of first value of x that lies below 0. Decimal values will be returned using a simple interpolation of the two values straddling 0.

jpkeller/spconf documentation built on March 11, 2024, 9:32 a.m.