R Tree-maps - make label background transparent

Question

I'm trying to create a treemap using R package treemap. Here is the code (it's a sample from the package)

library(treemap)
data(GNI2010)
treemap(GNI2010,
        index=c("continent", "iso3"),
        vSize="population",
        vColor="GNI",
        type="value")

The issue I'm having is with the colour of the labels. When I have just one index, then the output is ok:

library(treemap)
    data(GNI2010)
    treemap(GNI2010,
            index=c("iso3"), #single index
            vSize="population",
            vColor="GNI",
            type="value")

But when I have multiple indexes, then the label changes colour. I just want all labels to be transparent. Is that possible?

Answer 1

Just as I wrote this I found the solution in the documentation: you just need to add the option bg.lables = 0. Its a range from 0-255, by default its 220.

library(treemap)
data(GNI2010)
treemap(GNI2010,
        index=c("continent", "iso3"),
        vSize="population",
        vColor="GNI",
        type="value",
        bg.labels = 0)

There are other options in the package to let you play with colours. But at least the label can be transparent.