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Points conditionnal Coloring

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  Points conditionnal Coloring Louis-Alexandre <laeh@nyu.edu> - 2011-05-17 11:46 +0000
    Re: Points conditionnal Coloring Peter Pein <petsie@dordos.net> - 2011-05-19 11:43 +0000

#2421 — Points conditionnal Coloring

Hi,

I am trying to plot some points, and color them according to a particular Value.
 
dalist is of that kind : {{x1,y1,z1},{x2,y2,z2},... ,{xN, yN,zN}}

So I need a simple 2D plot where the color of the point will depend on the z value.

What I have :

Graphics[{Hue[#3], Point[{#1, #2}]} & @@@ dalist, Axes -> {True, True}]

Obviously this Hue[] is wrong.

Many thanks fo any help you could provide,

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#2477

Am 17.05.2011 13:46, schrieb Louis-Alexandre:
> Hi,
>
> I am trying to plot some points, and color them according to a particular Value.
>
> dalist is of that kind : {{x1,y1,z1},{x2,y2,z2},... ,{xN, yN,zN}}
>
> So I need a simple 2D plot where the color of the point will depend on the z value.
>
> What I have :
>
> Graphics[{Hue[#3], Point[{#1, #2}]}&  @@@ dalist, Axes ->  {True, True}]
>
> Obviously this Hue[] is wrong.
>
> Many thanks fo any help you could provide,
>

Hi,

a little bit easier than Alexei's version:

Graphics[{Hue[#3], Point[{#1, #2}]} & @@@
   Transpose[MapAt[Rescale, Transpose[dalist], 3]],
  Axes -> {True, True}]

Peter

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