Skip to main content

plotting - Mark an 2d-area on a 3dPlot (ListPlot3d)



I have a list {(IC,s,FK)}, which I use to generate a 3d-plot with the help of the command ListPlot3D. IC and s go from 0 to 1.


enter image description here


There is an area (lets say 0.11 < IC < 0.3, 0.1 < s < 0.4) which is specially important, because this is the physical range. For some reason I want to plot the whole parameter space, but highlight (for example with a red rectangle) this physical range. It would be great to frame the physical range with a red rectangle on the surface of the 3d-Plot. (In the end, this 2d-rectangle should look similar to these mesh lines, but it should frame the range, defined above).


Do you have any idea?



Answer



With


 data = Table[{x = RandomReal[{-1, 1}], y = RandomReal[{-1, 1}], x^2 - y^2}, {300}];

Three possible methods are




  1. using ColorFunction

  2. using a combination of Mesh, MeshFunctions and MeshShading, (or, and better yet, just Mesh and MeshShading as in @Brett's answer)

  3. produce two plots using different RegionFunction settings and combine them using Show.


Using ColorFunction:


 ListPlot3D[data, BoxRatios -> Automatic, Mesh -> None, 
ColorFunction -> Function[{x, y, z}, If[-.5 < x < .5 && -.3 < y < .1, Red, White]],
ColorFunctionScaling -> False, BoxRatios -> Automatic,
MaxPlotPoints -> 100, Lighting -> "Neutral"]


enter image description here


or with a different setting for the ColorFunction, say:


 ColorFunction -> Function[{x, y, z}, If[-.5 < x < .5 && -.3 < y < .1,
ColorData["DeepSeaColors", (1 + x)/2], Directive[Opacity[.7], Hue[(1 + z)/2]]]]

enter image description here


Using Mesh, MeshFunctions and MeshShading:


 ListPlot3D[data,
MeshFunctions -> {Boole[-.5 < #1 < .5 && -.2 < #2 < .75] &},
Mesh -> {{1}}, MeshShading -> {White, Red},

BoxRatios -> Automatic, MaxPlotPoints -> 100, Lighting -> "Neutral"]

enter image description here


Using RegionFunction and Show:


lp1 = ListPlot3D[data,
RegionFunction -> (! (-.5 < #1 < .5 && -.2 < #2 < .75) &),
Mesh -> None, BoxRatios -> 1,
MaxPlotPoints -> 100, Lighting -> "Neutral",
ColorFunction -> (Directive[Opacity[.9], Hue[#1]] &),
Lighting -> "Neutral", ImageSize -> 300];

lp2 = ListPlot3D[data,
RegionFunction -> ((-.5 < #1 < .5 && -.2 < #2 < .75) &),
Mesh -> None, BoxRatios -> 1,
MaxPlotPoints -> 100, Lighting -> "Neutral",
ColorFunction -> (Red &), Lighting -> "Neutral",
ImageSize -> 300];
Panel@Row[{lp1, lp2, Show[{lp1, lp2}]}, Spacer[5]]

enter image description here


Comments

Popular posts from this blog

front end - keyboard shortcut to invoke Insert new matrix

I frequently need to type in some matrices, and the menu command Insert > Table/Matrix > New... allows matrices with lines drawn between columns and rows, which is very helpful. I would like to make a keyboard shortcut for it, but cannot find the relevant frontend token command (4209405) for it. Since the FullForm[] and InputForm[] of matrices with lines drawn between rows and columns is the same as those without lines, it's hard to do this via 3rd party system-wide text expanders (e.g. autohotkey or atext on mac). How does one assign a keyboard shortcut for the menu item Insert > Table/Matrix > New... , preferably using only mathematica? Thanks! Answer In the MenuSetup.tr (for linux located in the $InstallationDirectory/SystemFiles/FrontEnd/TextResources/X/ directory), I changed the line MenuItem["&New...", "CreateGridBoxDialog"] to read MenuItem["&New...", "CreateGridBoxDialog", MenuKey["m", Modifiers-...

How to thread a list

I have data in format data = {{a1, a2}, {b1, b2}, {c1, c2}, {d1, d2}} Tableform: I want to thread it to : tdata = {{{a1, b1}, {a2, b2}}, {{a1, c1}, {a2, c2}}, {{a1, d1}, {a2, d2}}} Tableform: And I would like to do better then pseudofunction[n_] := Transpose[{data2[[1]], data2[[n]]}]; SetAttributes[pseudofunction, Listable]; Range[2, 4] // pseudofunction Here is my benchmark data, where data3 is normal sample of real data. data3 = Drop[ExcelWorkBook[[Column1 ;; Column4]], None, 1]; data2 = {a #, b #, c #, d #} & /@ Range[1, 10^5]; data = RandomReal[{0, 1}, {10^6, 4}]; Here is my benchmark code kptnw[list_] := Transpose[{Table[First@#, {Length@# - 1}], Rest@#}, {3, 1, 2}] &@list kptnw2[list_] := Transpose[{ConstantArray[First@#, Length@# - 1], Rest@#}, {3, 1, 2}] &@list OleksandrR[list_] := Flatten[Outer[List, List@First[list], Rest[list], 1], {{2}, {1, 4}}] paradox2[list_] := Partition[Riffle[list[[1]], #], 2] & /@ Drop[list, 1] RM[list_] := FoldList[Transpose[{First@li...

mathematical optimization - Minimizing using indices, error: Part::pkspec1: The expression cannot be used as a part specification

I want to use Minimize where the variables to minimize are indices pointing into an array. Here a MWE that hopefully shows what my problem is. vars = u@# & /@ Range[3]; cons = Flatten@ { Table[(u[j] != #) & /@ vars[[j + 1 ;; -1]], {j, 1, 3 - 1}], 1 vec1 = {1, 2, 3}; vec2 = {1, 2, 3}; Minimize[{Total@((vec1[[#]] - vec2[[u[#]]])^2 & /@ Range[1, 3]), cons}, vars, Integers] The error I get: Part::pkspec1: The expression u[1] cannot be used as a part specification. >> Answer Ok, it seems that one can get around Mathematica trying to evaluate vec2[[u[1]]] too early by using the function Indexed[vec2,u[1]] . The working MWE would then look like the following: vars = u@# & /@ Range[3]; cons = Flatten@{ Table[(u[j] != #) & /@ vars[[j + 1 ;; -1]], {j, 1, 3 - 1}], 1 vec1 = {1, 2, 3}; vec2 = {1, 2, 3}; NMinimize[ {Total@((vec1[[#]] - Indexed[vec2, u[#]])^2 & /@ R...