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I have Mathematica 8 and for some reason, the parameter "thickness" doesn't work in Parametric3D, it works in 2D very fine

ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, PlotStyle -> {Blue, Orange, Thickness[100]}]

Anyone know a remedy for this?

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If you want different colours but the same thickness then you can set the thickness with BaseStyle

ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, 
 BaseStyle -> AbsoluteThickness[5], PlotStyle -> {Blue, Orange}]

...otherwise

ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, 
 PlotStyle -> {{Blue, AbsoluteThickness[15]}, {Orange, 
    AbsoluteThickness[5]}}]

or (probably better)

ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, 
 PlotStyle -> {Directive[Blue, AbsoluteThickness[15]], Directive[Orange, 
    AbsoluteThickness[5]]}]

BTW, what is happening when you have PlotStyle -> {Blue, Orange, Thickness[100]} is that your first bunch of data is styled blue, your second bunch of data is styled orange and your third bunch of data is styled "mega-thick" ...but you don't have a third bunch of data. So if you try this instead

ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, 
 PlotStyle -> {Blue, Thickness[1], Orange}]

now the second lot of data is styled thick. etc.

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  • $\begingroup$ Good points. I guess he could use Directive as well. $\endgroup$
    – Mark McClure
    Dec 13, 2012 at 4:19
  • $\begingroup$ yes he could also use Directive and is probably the preferred way rather than lists $\endgroup$
    – Mike Honeychurch
    Dec 13, 2012 at 4:21
  • $\begingroup$ I got a huge black cylinder when I used "ParametricPlot3D[{{t, 0, -t}, {0, t, 2 t}}, {t, 0, 100}, PlotStyle -> {Blue, Thickness[1], Orange}]" $\endgroup$
    – Lemon
    Dec 13, 2012 at 4:30
  • $\begingroup$ @jak exactly -- that was the point of the exercise. Your second set of data is now styled "mega-thick" (but not orange). ...If you are surprised by how thick that was you should read the docs for Thickness $\endgroup$
    – Mike Honeychurch
    Dec 13, 2012 at 4:32
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    $\begingroup$ Yes, please use Directive to combine styles. $\endgroup$
    – Brett Champion
    Dec 13, 2012 at 4:40

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