Get a block of raster cell values
getValuesBlock returns values for a block (rectangular area) of values of a Raster* object.
## S4 method for signature 'RasterLayer' getValuesBlock(x, row=1, nrows=1, col=1, ncols=(ncol(x)-col+1), format='', ...) ## S4 method for signature 'RasterBrick' getValuesBlock(x, row=1, nrows=1, col=1, ncols=(ncol(x)-col+1), lyrs, ...) ## S4 method for signature 'RasterStack' getValuesBlock(x, row=1, nrows=1, col=1, ncols=(ncol(x)-col+1), lyrs, ...)
x |
Raster* object |
row |
positive integer. Row number to start from, should be between 1 and nrow(x) |
nrows |
positive integer. How many rows? Default is 1 |
col |
positive integer. Column number to start from, should be between 1 and ncol(x) |
ncols |
positive integer. How many columns? Default is the number of columns left after the start column |
format |
character. When |
lyrs |
integer (vector). Which layers? Default is all layers ( |
... |
additional arguments (none implemented) |
matrix or vector (if (x=RasterLayer), unless format='matrix')
r <- raster(system.file("external/test.grd", package="raster"))
b <- getValuesBlock(r, row=100, nrows=3, col=10, ncols=5)
b
b <- matrix(b, nrow=3, ncol=5, byrow=TRUE)
b
logo <- brick(system.file("external/rlogo.grd", package="raster"))
getValuesBlock(logo, row=35, nrows=3, col=50, ncols=3, lyrs=2:3)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.