 # Three-Dimensional Plot

Hi, I want to learn how to produce a three-dimensional plot in Gauss. Can Gauss make it? If so, can you please illustrate how to make it and what is required to make it? Thanks!

0

GAUSS can create surface and contour plots. Here is some code to create a simple surface plot.

``````// Create data
y = seqa( -4, 0.1, 80);
x = y';
z = sin(y)*cos(y)';

// Plot data using default
// settings from Tools->Preferences->Graphics
plotSurface( x, y, z );``````

You can also run the example file `plotspline.e`, which is another surface plot example that comes with GAUSS. aptech
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0

That is great and the plot looks fantastic, but what if z is a one-dimensional vector like x and y? 0

Well `plotSurface` is not really designed to draw lines, but any `z` values which contain a missing value will be invisible. So you could fill in only the `z` values that you want like this:

``````// Create data
y = seqa( -4, 0.1, 80);
x = y';

// Line we want to draw
tmp = sin(y);

// Create matrix of missing values
z = reshape(error(0), rows(y), cols(x));

// Fill two columns of 'z' with the line we want to draw
// because a line using only 1 column will be hard to see
z[.,9 10] = reshape(tmp, rows(tmp), 2);

plotSurface( x, y, z );``````

The line does not have to be just down a row or column, but that just makes for the simplest example. aptech
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