xyz2dataframe: Convert a surface in xyz to a data frame.

In prevR: Estimating Regional Trends of a Prevalence from a DHS and Similar Surveys

Convert a surface in xyz to a data frame.

Description

Several functions (for example KernSmooth::bkde2D()) return a surface as a list "xyz" composed of three elements: vector of ordinates in the x dimension, vector of ordinates in the y dimension and a matrix with the values of the surface in x and y. This function transforms a list "xyz" into a data frame.

Usage

xyz2dataframe(xyz, xcol = 1, ycol = 2, zcol = 3)

Arguments

xyz	a list with 3 elements: a vector with x-coordinates, a vector with y-coordinates and and matrix with value for each point of coordinates ⁠x[i], y[j]⁠.
xcol	x index.
ycol	y index.
zcol	z index.

Value

A data.frame.

Note

xyz could be a list like x,y,z1,z2,z3. If so, zcol should be equal to c("z1","z2","z3") or c(3,4,5).

Examples

x <- matrix(c(2, 4, 6, 8, 10, 2, 4, 6, 8, 10), ncol = 2)
op <- KernSmooth::bkde2D(x, bandwidth = 1)
str(op)

op.df <- xyz2dataframe(op)
str(op.df)

prevR documentation built on May 31, 2023, 7:32 p.m.