Hi, I am trying to create a treemap for a non-symmetric tree where some branches have more sub-branches than others. I have tried tools in two packages, but have encountered some problems that I hope more experienced users on this list can help address. The PORTFOLIO package offers MAP.MARKET, but this provides only a single depth of branching ("category") before rendering the leaves. I could create combined-categories from multiple columns, but these would not be nested--or even necessarily rendered close to each other. The "color" option provides a similar workaround with similar shortcomings. The VCD package offers MOSAIC, which may be flexible enough to be tweaked into rendering treemaps. One problem that arises is the rendering of empty cells as vertical or horizontal lines, which makes reading the maps more difficult. Empty cells in my case do not convey more information since they are rather intuitive. I would prefer not to render them at all and use location, labeling, and color to make the branching structure clear. Is this possible? Are there other packages or options I should consider? Thank you, -david