Convert a numeric matrix to native raster image
matrix_to_nr(mat, palette, fill = "transparent", min = 0, max = 1, dst = NULL)Arguments
- mat
integer matrix
- palette
vector of colors. For an integer matrix, this palette must contain at least as many colors as the maximum integer value in
mat. For a numeric matrix, any length palette is allowed.- fill
Color to be used for values < 1 when input is an integer matrix. Default: 'transparent'.
- min, max
assumed range for the numeric data. values from the palette will be interpolated using this range as the extents. An error will occur if a value lies outside this range. Default: (0, 1)
- dst
destination native raster image. If NULL (the default) a new native raster image will be created If a native raster image is supplied here, it must have the exact dimensions to match the matrix
Value
native raster image
See also
Other conversion functions:
magick_to_nr(),
nr_to_raster(),
nrs_to_gif(),
nrs_to_mp4()
Examples
m <- matrix(1:12, 3, 4)
m
#> [,1] [,2] [,3] [,4]
#> [1,] 1 4 7 10
#> [2,] 2 5 8 11
#> [3,] 3 6 9 12
palette <- colorfast::col_to_int(rainbow(12))
nr <- matrix_to_nr(m, palette)
plot(nr)
