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47 lines
1.6 KiB
R
47 lines
1.6 KiB
R
% Generated by roxygen2: do not edit by hand
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% Please edit documentation in R/select_bands.R
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\name{select_bands}
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\alias{select_bands}
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\title{Select bands of a data cube}
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\usage{
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select_bands(cube, bands)
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}
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\arguments{
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\item{cube}{source data cube}
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\item{bands}{character vector with band names}
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}
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\value{
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proxy data cube object
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}
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\description{
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Create a proxy data cube, which selects specific bands of a data cube. The resulting cube
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will drop any other bands.
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}
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\note{
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This function returns a proxy object, i.e., it will not start any computations besides deriving the shape of the result.
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For performance reasons, \code{select_bands} should always be called directly on a cube created with \code{\link{raster_cube}} and
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drop all unneded bands. This allows to reduce RasterIO and warp operations in GDAL.
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}
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\examples{
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# create image collection from example Landsat data only
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# if not already done in other examples
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if (!file.exists(file.path(tempdir(), "L8.db"))) {
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L8_files <- list.files(system.file("L8NY18", package = "gdalcubes"),
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".TIF", recursive = TRUE, full.names = TRUE)
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create_image_collection(L8_files, "L8_L1TP", file.path(tempdir(), "L8.db"), quiet = TRUE)
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}
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L8.col = image_collection(file.path(tempdir(), "L8.db"))
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v = cube_view(extent=list(left=388941.2, right=766552.4,
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bottom=4345299, top=4744931, t0="2018-04", t1="2018-07"),
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srs="EPSG:32618", nx = 497, ny=526, dt="P1M")
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L8.cube = raster_cube(L8.col, v)
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L8.rgb = select_bands(L8.cube, c("B02", "B03", "B04"))
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L8.rgb
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\donttest{
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plot(L8.rgb, rgb=3:1)
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}
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}
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