How to plot 3-D grid data in scatter plot?

조회 수: 4(최근 30일)
Ferry Nieuwland
Ferry Nieuwland 2020년 10월 13일
편집: Jorg Herwanger 2022년 1월 14일
Hello Community,
I have 2 datasets from a 3-D simulation model. I can easily read these datasets into Matlab and see the data. I now want to plot these 2 datasets on a scatter plot. I am struggling to get this data plotted.
I load the grid with:
>> A=load('PERM2.mat')
A =
struct with fields:
Node: [1×1 struct]
Same for 2nd dataset.
When I do:
>> plot(A.Node.Value,B.Node.Value)
Error using plot
Data cannot have more than 2 dimensions.
And this is where I am stuck. Any suggestion what I am doing wrong or what I need to do to plot these 2 datasets? I have attached the 2 datasets.
  댓글 수: 1
Jorg Herwanger
Jorg Herwanger 2021년 8월 17일
편집: Jorg Herwanger 2022년 1월 14일
You can reshape both 3-D arrays into vectors of length nx*ny*nz.
PERM = load('PERM2.mat')
PERM_Vector = reshape(PERM.Node.Value,[51*107*57,1,1])
PHIE = load('PHIE.mat')
PHIE_Vector = reshape(PHIE.Node.Value,[51*107*57,1,1])
In the example, I get the dimensions of the 3D array (51 x 107 x 57) using size(PERM.Node.Value).
I think I know what you want to do: you can now establish a relationship between PHIE and PERM from the crossplot.

댓글을 달려면 로그인하십시오.

채택된 답변

KSSV 2020년 10월 13일
편집: KSSV 2020년 10월 13일
I think your mat files has 3D matrices. You need to use cpcolor or surf to plot them.
load PERM2.mat ;
A = Node.Value ;
[m,n,p] = size(A) ;
for i = 1:p
shading interp
If you have x, y you can provide them in pcolor.
  댓글 수: 2
KSSV 2020년 10월 13일
What do you mean by cross plot? Won't surf/ pcolor work for you?
In case are you looking to plot a slice..have a look on slice function.

댓글을 달려면 로그인하십시오.

추가 답변(1개)

Ferry Nieuwland
Ferry Nieuwland 2020년 10월 13일
The A matrix is made up of 51 x 107 x 51 datapoints. The B matrix has same size, 51 x 107 x 51 datapoints. Point A(1,1,1) correlates to point B(1,1,1) , etc.
I want to create a plot where all A points are plotted on X-axis and all corresponding B values on the Y-axis. That is what I am trying to do: to investigate the correlation between these datasets. The slice and surf function did not help here.
Any suggestion how to do this?

Community Treasure Hunt

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

Start Hunting!

Translated by