stratified_sampling_sf: Spatially stratified random sample points from an image.

In SpaTopic: Topic Inference to Identify Tissue Architecture in Multiplexed Images

Spatially stratified random sample points from an image.

Description

Spatially stratified random sample points from an image by R package sf

Usage

stratified_sampling_sf(
  points,
  cellsize = c(600, 600),
  num_samples_per_stratum = 1
)

Arguments

points	a data frame contains all points in a image with X, Y coordinates.
cellsize	a vector of length 2 contains the size of each grid square. Default c(600,600).
num_samples_per_stratum	number of point selected from each grid square. Default 1.

Value

Return a vector contains index of sampled points.

Examples

data("lung5")
pt_idx<-stratified_sampling_sf(lung5, cellsize = c(600,600))

SpaTopic documentation built on April 4, 2025, 1:38 a.m.