plotting - Exporting BarChart3D as PDF produces artifacts

So I think the following image already shows the problem, similar to Avoiding white lines inside filled area in RegionPlot exported as PDF or PS the pdf export of the chart creates thin lines in the plot. The fixing rule proposed in the related question seems not to work (sorry I am really new to mathematica). Disabling the Antialiasing doesnt improves the situation!

BarChart3D

Answer

Solution

The problem seems to be that the polygonal regions in the exported PDF file do not have edge strokes. It can be partially solved by reimporting the figure and correct this.

(* FILENAME.pdf contains an exported BarChart3D figure *)
(* 't' gives the desired edge thickness *)
chart = Import["FILENAME.pdf"];
chart = chart /. {FaceForm[n__] :> {FaceForm[n], EdgeForm[{Thickness[t], n}]}};
Export["NEW_FILENAME.pdf", chart];

I tested this code only for BarChart3D output. It seems that in the reimported figure all colored regions are defined by FilledCurves and all additional lines by JoinedCurves. Furthermore, a FaceForm definition is only found in the region declarations.

Possible problem

Different PDF viewers seem to interpret a Thickness[n] declaration differently. This can be solved by replacing Thickness with AbsoluteThickness.

Benefit

This solution preserves the vector graphics character of the chart in the exported PDF file. @Jens solution rasterizes the image and makes it resolution dependent.

Comments

plotting - Filling between two spheres in SphericalPlot3D

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plotting - Plot 4D data with color as 4th dimension

I have a list of 4D data (x position, y position, amplitude, wavelength). I want to plot x, y, and amplitude on a 3D plot and have the color of the points correspond to the wavelength. I have seen many examples using functions to define color but my wavelength cannot be expressed by an analytic function. Is there a simple way to do this? Answer Here a another possible way to visualize 4D data: data = Flatten[Table[{x, y, x^2 + y^2, Sin[x - y]}, {x, -Pi, Pi,Pi/10}, {y,-Pi,Pi, Pi/10}], 1]; You can use the function Point along with VertexColors . Now the points are places using the first three elements and the color is determined by the fourth. In this case I used Hue, but you can use whatever you prefer. Graphics3D[ Point[data[[All, 1 ;; 3]], VertexColors -> Hue /@ data[[All, 4]]], Axes -> True, BoxRatios -> {1, 1, 1/GoldenRatio}]

plotting - Adding a thick curve to a regionplot

Suppose we have the following simple RegionPlot: f[x_] := 1 - x^2 g[x_] := 1 - 0.5 x^2 RegionPlot[{y < f[x], f[x] < y < g[x], y > g[x]}, {x, 0, 2}, {y, 0, 2}] Now I'm trying to change the curve defined by $y=g[x]$ into a thick black curve, while leaving all other boundaries in the plot unchanged. I've tried adding the region $y=g[x]$ and playing with the plotstyle, which didn't work, and I've tried BoundaryStyle, which changed all the boundaries in the plot. Now I'm kinda out of ideas... Any help would be appreciated! Answer With f[x_] := 1 - x^2 g[x_] := 1 - 0.5 x^2 You can use Epilog to add the thick line: RegionPlot[{y < f[x], f[x] < y < g[x], y > g[x]}, {x, 0, 2}, {y, 0, 2}, PlotPoints -> 50, Epilog -> (Plot[g[x], {x, 0, 2}, PlotStyle -> {Black, Thick}][[1]]), PlotStyle -> {Directive[Yellow, Opacity[0.4]], Directive[Pink, Opacity[0.4]],

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