如何在MATLAB中从N个点中随机选择一个点? [英] How would I randomly pick one point from N points in MATLAB?

问题描述

我使用以下代码创建和绘制N点:

I use this code to create and plot N points:

N = input('No. of Nodes:');
data = rand(N,2); % Randomly generated n no. of nodes
x = data(:,1);
y = data(:,2);

plot(x,y,'*')
hold on

我将如何随机选择这些点之一?

How would I randomly pick one of these points?

推荐答案

randnum=ceil(rand(1)*N)  %Sample a random integer in the range 0 to N
your_node = [x(randnum),y(randnum)] %Here is the sampled node from your data set

Edit: changed floor to ceil. 

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