gdalcubes (version 0.3.1)

apply_pixel.array: Apply a function over pixels in a four-dimensional (band, time, y, x) array

Description

Apply a function over pixels in a four-dimensional (band, time, y, x) array

Usage

# S3 method for array
apply_pixel(x, FUN, ...)

Arguments

x

four-dimensional input array with dimensions band, time, y, x (in this order)

FUN

function that receives a vector of band values in a one-dimensional array

...

further arguments passed to FUN

Details

FUN is expected to produce a numeric vector (or scalar) where elements are interpreted as new bands in the result.

Examples

# NOT RUN {
d <- c(4,16,32,32)
x <- array(rnorm(prod(d)), d)
y <- apply_pixel(x, function(v) {
  v[1] + v[2] + v[3] - v[4]
})
dim(y)
# }