draw line between points in the figure

3 次查看(过去 30 天)
points_id={'p1','p2','p3','p4'}
x=[100,120,130,140] %coordinates
y=[200,220,330,340] %coordinates
figure(1),scatter(x, y, 'b^');grid on;
text(x, y, points_id)
title('COORDINATE SYSTEM')
xlabel('Y')
ylabel('X')
% in this figure I wanna draw lines between points when user click on corresponding points.

采纳的回答

Image Analyst
Image Analyst 2014-4-29
Get the points, for example by using ginput. Then find out which of the points is closest to the 2 points they clicked on. Then draw a line between them. Here's a demo:
clc;
clear all;
workspace
points_id={'p1','p2','p3','p4'}
x=[100,120,130,140] %coordinates
y=[200,220,330,340] %coordinates
figure(1),scatter(x, y, 'b^');
grid on;
text(x, y, points_id)
title('COORDINATE SYSTEM')
xlabel('Y')
ylabel('X')
uiwait(msgbox('Click on two points', 'modal'));
[xu, yu] = ginput(2);
% Find the closest point to the first point where they clicked.
distances1 = sqrt((x-xu(1)).^2 + (y - yu(1)).^2)
[~, index1] = min(distances1)
% Find the closest point to the second point where they clicked.
distances2 = sqrt((x-xu(2)).^2 + (y - yu(2)).^2)
[~, index2] = min(distances2)
line([x(index1), x(index2)], [y(index1), y(index2)])
  6 个评论
sermet
sermet 2014-4-29
编辑:sermet 2014-4-29
could you give example codes for what you meant please?
Image Analyst
Image Analyst 2014-4-29
I don't have any sample/demo code for that. Either you or I would have to write it. I vote for you.

请先登录,再进行评论。

更多回答(0 个)

类别

Help CenterFile Exchange 中查找有关 Data Exploration 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