# [✓]  Plot multiple lines on ParametricPlot3D?

Posted 10 months ago
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 How does one plot multiple lines on ParametricPlot3D? ParametricPlot3D[{{u, 0, 0}, {0, 0, p}}, {u, -1, 1}, {p, -1, 1}] This snippet of code works and plots two lines, however when this is extended to three lines it fails. ParametricPlot3D[{{u, 0, 0}, {0, s, 0}, {0, 0, p}}, {u, -1,1}, {p, -1, 1}, {s, -1, 1}] This line fails. I would like to extended this to 5+ lines. Any help would be appreciated.
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Posted 10 months ago
 Following the documentation - the function accepts only two parameters. When you tried to plot 3 lines you used 3 parameters and then the function crashes Here is a simple example with several lines and two parameters that you may try ParametricPlot3D[{{u, 0, 0}, {1, 0, u}, {0, 0, p}, {1, 0, p}}, {u, -1, 1}, {p, -1, 1}] BTW, you may use one or two parameters. The way that you use them determine if you define a line or a surface For example:Several lines with a single parameter: ParametricPlot3D[{{u, 0, 0}, {0, u, 0}, {0, 0, u}, {0, u, u}, {u, u, u}}, {u, -1, 1}] A surface with two parameters ParametricPlot3D[{{(u + v)^2, v, u}}, {u, -1, 1}, {v, -1, 1}] Several surfaces with two parameters ParametricPlot3D[{{(u + v)^2, v, u}, {v, u, (u + v)^2}}, {u, -1, 1}, {v, -1, 1}] bestyehuda