How to draw a picture like this?

Question

enter image description here

That is what l want,but l can only use Show,Plot3D to get something just like this

enter image description here

What should l do?Thanks~

First of all you should post a Mathematica code for those who might wish to help you without wasting their time — Alexei Boulbitch, Feb 05 '15 at 09:56

score 4 · Accepted Answer · answered Feb 05 '15 at 10:04

4

Try this:

 Show[{
  Plot3D[x^2, {x, -2, 2}, {y, -2, 2}],
  ParametricPlot3D[{x, 0, x^2 + 0.15}, {x, -2, 1.9}, 
    PlotStyle -> Arrowheads[0.07]] /. Line -> Arrow

    }]

yielding

enter image description here

Have fun!

answered Feb 05 '15 at 10:04

Alexei Boulbitch

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How to draw a picture like this?

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