Plot Border of Clusterred Data

2019 11 18
0 个回答
更新时间：2019 11 21
4 次查看（30 天）

0 个投票

I want to cluster the data in the attached file to find at which location certain time (period) di dominant. Thus, I want to plot the border of clusterring data in my contour plot.
I find the interesting example in this mathworks example:
% border clustering
xy1 = [randn(50,1) randn(50,1)];
xy2 = [randn(50,1)+5 randn(50,1)];
xy3 = [randn(50,1) randn(50,1)+5];
[idx,c] = kmeans([xy1; xy2; xy3],3)
figure
hold on
plot(xy1(:,1),xy1(:,2),'ro')
plot(xy2(:,1),xy2(:,2),'go')
plot(xy3(:,1),xy3(:,2),'bo')
voronoi(c(:,1),c(:,2))
However, I don't know how to implement such code to my data. Some help is really appreciated.
EK

6 个评论
显示 4更早的评论 隐藏 4更早的评论

darova
darova 2019-11-18
try clusterdata
Image Analyst
Image Analyst 2019-11-18
编辑：Image Analyst 2019-11-18
  1. What do each of the 3 columns represent?
  2. How many clusters do you think there are? (What is k?)
  3. Why do you think there are clusters in the first place?
  4. Do you want clusters in 3-D or in 2-D (over just two of the columns, if so which ones?)
  5. Exactly what does "certain time (period) di dominant" mean?
data = xlsread('data_test.xls');
plot3(data(:, 1), data(:, 2), data(:, 3), '.', 'MarkerSize', 50);
grid on;
edward kabanyas
edward kabanyas 2019-11-18
Thank you Image analysist. The first column is latitude, second is longitude, third is time/period (period). I want to cluster period into 4 cluster i.e 0-5, 6-11, 12-17, 18-23. I want know at which location/area certain time (period) di dominant by plotting the border of area of each cluster of time.
EK
edward kabanyas
edward kabanyas 2019-11-20
My array is 2 dimensional data (x,y, z) where data(i,j) gives the z coordinate for indices i, j ? I want to form a cluster using Z to see which cluster is located where on spatial map.
Image Analyst
Image Analyst 2019-11-21
Why not use scatter3() where each z value range is given a different color?
And again, I don't know what "di dominant" means? I've never even heard of the adjective "di".
edward kabanyas
edward kabanyas 2019-11-21
>And again, I don't know what "di dominant" means?
Sorry, this is typo, I mean "is dominant"...if we use scatter3(), can we plot the border of the area coverred by z value range on spatial map?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Scatter Plots 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by