Re: Meshshading

*To*: mathgroup at smc.vnet.net*Subject*: [mg119786] Re: Meshshading*From*: Jean-Louis Garcin <jeanlouisgarcin at free.fr>*Date*: Wed, 22 Jun 2011 03:44:57 -0400 (EDT)*References*: <20110620195531.954AR.827192.imail@eastrmwml32> <201106210956.FAA21053@smc.vnet.net> <304BE863-53DE-46B0-8C97-846CF38703B5@gmail.com>

Hello Thank you for this answer. I think it is the solution of my problem. Best regards Jean-Louis Garcin Le 21 juin 2011 =E0 13:11, Heike Gramberg a =E9crit : > As you surmised yourself, MeshShading->Automatic uses ColorFunction to colour > the area between the mesh lines. Unfortunately, you can only provide one ColorFunction in > ParametricPlot. If you want to shade the areas between the mesh lines using two > different ColorFunctions, you could do something like > > pl1 = ParametricPlot[{(v + u) Cos[u], (v + u) Sin[u]}, {u, 0, > 4 Pi}, {v, 0, 5}, > ColorFunction -> {Function[{x, y, u, v}, Hue[x]]}, > MeshFunctions -> {#3 &}, MeshShading -> {None, Automatic}]; > pl2 = ParametricPlot[{(v + u) Cos[u], (v + u) Sin[u]}, {u, 0, > 4 Pi}, {v, 0, 5}, > ColorFunction -> Function[{x, y, u, v}, GrayLevel[v]], > MeshFunctions -> {#3 &}, MeshShading -> {Automatic, None}]; > Show[pl1, pl2] > > Heike. > > > On 21 Jun 2011, at 10:56, Jean-Louis Garcin wrote: > >> >> Thank you for your answer but it does not work like I want. >> The colors are always the same. Yellow and Black don't change with >> the position of the mesh. >> In the example of the Wolfram Website one of the color change. >> I think the program uses the function ColorFunction but there is only >> one ColorFunction and it is used in the the line MeshShading -> {Black, >> Automatic}. >> >> I would want that the Color Black changes also. >> >> Thank you >> >> Jean-Louis Garcin >> >> >> >> Le 21 juin 2011 =E0 01:55, Bob Hanlon a =E9crit : >> >>> >>> ParametricPlot[{(v + u) Cos[u], (v + u) Sin[u]}, >>> {u, 0, 4 Pi}, {v, 0, 5}, >>> MeshFunctions -> {#3 &}, >>> MeshShading -> {Black, Yellow}, >>> Axes -> False] >>> >>> >>> Bob Hanlon >>> >>> ---- Jean-Louis Garcin <jeanlouisgarcin at free.fr> wrote: >>> >>> ============= >>> >>> Hello, >>> >>> >>> In the documentation center of the Wolfram Website we find the >>> following example: >>> >>> ParametricPlot[{(v + u) Cos[u], (v + u) Sin[u]}, {u, 0, 4 Pi}, {v, 0, 5}, >>> ColorFunction -> Function[{x, y, u, v}, Hue[x]], MeshFunctions -> {#3 &}, >>> MeshShading -> {Black, Automatic}] >>> >>> >>> One color is always the same: Black and I think that the other one >>> depends of the row of the mesh. >>> >>> Is it possible that the two colors depends of the of the row of the mesh? >>> And how to do it? >>> >>> Thank you very much for your answer. >>> >>> >>> Jean-Louis Garcin >>> >>> >> >> > >

**References**:**Re: Meshshading***From:*Jean-Louis Garcin <jeanlouisgarcin@free.fr>