MATLAB Answers

How to retrieve z value from surf plot given x and y?

조회 수: 18(최근 30일)
Kyle Gao
Kyle Gao 19 Sep 2018
댓글: Kyle Gao 19 Sep 2018
I got a surface useing:
s= surf(X, Y, Z)
Since the X, Y, and Z are discrete, I want to get the consecutive value of Z. For example, the origin data X and Y are all integers, and I don't the relationship between XY and Z, I want to get the z value where X = 1.87 and Y = 2.9. Is it possible? What should I do?

  댓글 수: 0

댓글을 달려면 로그인하십시오.

채택된 답변

Cedric Wannaz
Cedric Wannaz 19 Sep 2018
편집: Cedric Wannaz 19 Sep 2018
where Xq and Yq are defined using the values given in your question.

  댓글 수: 3

Kyle Gao
Kyle Gao 19 Sep 2018
Thank you so much for your help! But I still need the query grid with a certain spacing value by using interp2. My problem is that I can't have the spacing value (or the grid), it needs to give me the Z value for a random X and Y. Any ideas?
Cedric Wannaz
Cedric Wannaz 19 Sep 2018
Unless I misunderstand your question, you can just set
Xq = 1.87 ;
Yq = 2.9 ;
and have Zq with
Zq = interp2( X, Y, Z, Xq, Yq ) ;
Kyle Gao
Kyle Gao 19 Sep 2018
Yeah! This solved my question perfectly!

댓글을 달려면 로그인하십시오.

추가 답변(0개)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by