# Plot 3D¶

Fig. 25 shows a typical view of the **3D** tab for 3D visualizations
of the magnitude frequency response and poles / zeros. Fig. 25 is a
surface plot which looks nice but takes the longest time to compute.

You can plot 3D visualizations of \(|H(z)|\) as well as \(|H(e^{j\omega})|\) along the unit circle (UC).

For faster visualizations, start with a mesh plot (Fig. 26) or a contour plot and switch to a surface plot when you are pleased with scale and view.