How can I draw 3d graph from 4 variables?

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Dr. Khaled FOUDA 2014-9-6

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评论： Dr. Khaled FOUDA 2014-9-12

I have a robot arm with 4 Degrees of freedom and I want to draw its work space like the image below

I have 3 functions that convert from q1,q2,q3,q4 to x,y,z, and I have the range of q Please help me to draw this volume.

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Image Analyst 2014-9-6

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How can we do that? How can we help you? If someone asked you what you asked us, and supplied what you supplied, would you be able to help them?

Roger Stafford 2014-9-6

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As Image Analyst has indicated, your description is woefully lacking in detail and clarity. However it appears to me to also contain contradictory aspects. You ask to portray with a three-dimensional graph the "volume" of an arm with four degrees of freedom. Yet you display a graph which is the surface of a volume apparently determined by only three parameters, not four.

If you want an answer to your question, you should give far more details and you should clarify the apparent discrepancy between the number of parameters evident in the displayed graph and what you are asking for. In particular, you should certainly give us those three equations you say you have that convert from the four parameters to cartesian coordinates.

Dr. Khaled FOUDA 2014-9-12

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I have a function of conversion from q1,q2,q3, and q4 to x,y,z [x y z] = converttoxyz(q1,q2,q3,q4); q1=(-90:10:90); q2=(-10:5:10); q3=(-12:3:12); q4=(0:10:90); when I put q3,q4 as constant value, and use mesh generated from q1,q2 I got a surface not a volume, how can I draw this volume?