Fixing ListSliceContourPlot3D

Question

I am trying to plot a sort of 3D anisotropic convection-diffusion equation. I want to use ListSliceContourPlot3D to show the solution u[t,x,y,z] at various time points. It kind of works, but it has this blue noise (away from the orange shells), which should not be there.

My code is just:

ListSliceContourPlot3D[xyzw1, "CenterPlanes", DataRange -> {{-4, 4}, {-4, 4}, {-2, 2}}]

I thought rounding or thresholding might help, but it does not. I'd be grateful for any suggestions.

The data can be accessed here.

Answer 1

The issue is that some of your data has a very small negative value

data = << "http://pastebin.com/raw/SaWhxvm0";
MinMax@N@(Last /@ data)
(* {-0.00056, 0.80093} *)

So the places where it crosses zero are drawn as a contour. If it were a 2D plot, the ToolTip would have shown the contour value. Whether this is noise or not, I can't say, but you can omit that contour by manually specifying the contours yourself. As rcollyer points out, the DataRange option is for when you have an array of values and need to specify the x,y, and z values. But since you are giving those values in your data, this option is unnecessary here (if you want to restrict the plotted range you would use the PlotRange option).

ListSliceContourPlot3D[data, "CenterPlanes", 
 Contours -> Range[0.05, 0.8, .05]]