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copied!<p>You have two issues here: (1) how to import the data into Mathematica and (2) how to display it.</p> <p>For the first problem, the simplest answer is: it depends on the format of the data. If the file is one of the <a href="http://reference.wolfram.com/mathematica/guide/ImportingAndExporting.html" rel="nofollow noreferrer">supported types</a>, Import has a number of capabilities that can't be beat. If your data is just tab (or, whitespace) delimited, use the "Table" format, as follows:</p> <pre><code>Import["file name", "Table"] </code></pre> <p>using the various import options to specify the record and field separators. Alternatively, you can use ReadList, which simply reads in a list of values. If your data is of the form</p> <pre><code>value value value ... value etc. </code></pre> <p>where value is numeric and each line is a separate record, I'd import it using</p> <pre><code>ReadList["file name", Number, RecordLists -> True] </code></pre> <p>which loads the file into a rectangular array.</p> <p>As to the second problem, if your data is a set of triples, i.e. (x, y, z), or just a set of height values, then ListPlot3D should work just fine. If your data is instead of the form (x, y, z, f), where f is the function value at (x, y, z), then you should use ListContourPlot3D instead. You specify which contours you want by using the Contour option. Be warned, ListContourPlot3D may take a while to generate the plot depending on how large your data set is. Also, it can be a memory hog, on my machine (G4, MacOS 10.4, 2 GB) a ListContourPlot3D of an 80 x 80 x 80 grid can easily take 500 MB.</p>

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