Hi Matt, There are at least 3 ways (none of them in ROOT) to show 4-D data: - as a 3-d scatter plot where the marker color is used for the 4-th dimension. This options can be used now with multiple passes with TTree::Draw. It could be implemented as a standard option in TTree::Draw. - as a stack of slices of projections of a TH3 drawn with the "cont" options. May give good results for a small number of slices (bins in Z) - as a true 3-d contour plot for f(x,y,z) = k and a slider is used to dynamically change the value of k (most interesting option). The first and third options will be implemented as soon as we get new manpower in the project (expected soon now). Rene Brun On Fri, 8 Mar 2002, Matt Palmer wrote: > Hi, > It'd be quite useful for me if it were possible to plot 4D data using 3D > plots + colour. It seems to me that this shouldn't be too hard because ROOT > can already plot 3D graphs with colour defined by the colour a contour plot > would show - it'd just require a way of controlling which colour the bins > get, so, um, any plans to do this? > > Thanks > Matt >
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