slideWindows: Create Sliding Windows Over a Spatial Object

In hyperbrick: Accessory Tools for Preprocessing Hyper-Spectral Images

Create Sliding Windows Over a Spatial Object

Description

Create a prefixed number of non-overlapping sliding windows that cover the entire extent of a spatial object.

Usage

slideWindows(x, n = c(8, 8))

Arguments

x	A spatial object where an extent can be extracted from. Classes: Extent, RasterLayer, RasterBrick, RasterStack (from package raster).
n	An integer vector of length two determining the number of divisions in x and y directions. Default is n = c(8, 8), which creates 64 windows.

Value

An object of class slideWindows, which consists of a list of each sliding-windows extent.

See Also

slideBrick(), raster::extent

Examples

# Example 1
p <- system.file('exdata', 'soybean.tif', package = 'hyperbrick')
im <- brick(p)
plotRGB(im)

sw <- slideWindows(im, n = c(8, 8))
lapply(sw, lines) -> null_obj
lines(sw[[1]], col = "white", lwd = 3)
lines(sw[[64]], col = "white", lwd = 3)

# Example 2
ext <- extent(c(30, 350, 150, 230))
lines(ext, col = "red", lwd = 3)
sw2 <- slideWindows(ext, n = c(18, 6))
lapply(sw2, lines, col = "red") -> null_obj

hyperbrick documentation built on April 1, 2022, 9:07 a.m.