Make a scalebar to accompany an image.im3d plot

imscalebar(
  levels,
  col,
  nlevels = NULL,
  zlim = NULL,
  horizontal = TRUE,
  lab = "Density",
  mar = c(4, 2, 2, 2) + 0.1,
  border = NULL,
  ...
)

Arguments

levels: The levels at which z values were cut or a list returned by image.im3d
col: The plotted colours for each level
nlevels: The number of colour levels (inferred from levels when NULL)
zlim: The limits of the plotted z (intensity) values of the image
horizontal: Whether to make a horizontal or vertical scalebar (default: TRUE)
lab: The (single) axis label for the scale bar (default: Density)
mar: The margins for this plot
border: Color for rectangle border (see rect's border argument for details).
...: Additional arguments for plot

Examples

if (FALSE) {
LHMask=read.im3d(system.file('tests/testthat/testdata/nrrd/LHMask.nrrd',package='nat'))
op=par(no.readonly = TRUE)
layout(matrix(c(1, 2), ncol = 2L), widths = c(1, 0.2))
rval=image(imslice(LHMask,10), asp=TRUE)
imscalebar(rval)
par(op)
}