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Mathematica 3D plotting question

  1. Aug 1, 2010 #1
    I'd like to make a single 3D graph that contains a scatter plot and a plane. Ideally I'd like to import the data for the point from an excel file, but if I have to punch it in, I can find a few hours to kill. Anyway, can anyone help me with the code for this? I can get a 3D scatter plot where I'm just typing in the coordinates of each point, but I'm not sure where to go from there.
  2. jcsd
  3. Aug 1, 2010 #2
    To emulate getting some data from excel, here's some random data - saved as a csv file:

    In[1]:= data=RandomReal[{0,1},{50,3}];
    In[2]:= Save[ToFileName[NotebookDirectory[], "data.csv"],data]

    All you need to do is save your table of data as a csv file from excel. Probably using save as or maybe export. The load it into mma using, eg

    In[3]:= Get[ToFileName[NotebookDirectory[], "data.csv"]];

    Here's a plane...

    In[4]:= plane=Graphics3D[{Opacity[.5],Polygon[{{0,0,.4},{0,1,.4},{1,1,.4},{1,0,.4}}]}];

    Here's a scatter plot + plane:

    In[5]:= Show[ListPointPlot3D[data, PlotStyle->Red], plane]
  4. Aug 1, 2010 #3
    Thanks for the help-- I wound up using this for the plane:

    plane = Plot3D[{1.295*x + .6415*y + 16.09}, {x, -3, 3}, {y, -3, 3} ]

    I'd like to make add in Opacity[.5], but I'm not sure where to put it in and the Plot3D help file doesn't show it as an option (at least that I can find). Any advice?
  5. Aug 1, 2010 #4
    Nevermind, I found it!

    PlotStyle -> Directive[Opacity[0.5]]
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