Tips for skecthing 3D functions?

  • Thread starter Oomair
  • Start date
  • #1
36
0

Homework Statement



im having problems on how to sketch 3D functions, like z=4-x-y, any tips or website that gives a summary and useful techniques to graph functions like this?

Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
378
2
-Use Matlab :wink:
-make either x or y = 0 and then find how the thing looks in z-y or z-x plane
-find what happens when x--> inf y=0 or y--> inf , x =0 or y-->inf x -->inf
-Draw contours (should have learned them before getting into 3d)
 
  • #3
334
0
I agree with rootx. plotting the functions when x or y = 0 is a good tool.
 
  • #4
1,752
1
I still don't quite understand contours :(
 
  • #5
378
2
neither me ><
using k = 0,1,2.. works most times..
sometimes, using z-x and z-y plane
or, converting to rec/spherical co-ods
 

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