从一组坐标构造一个矩阵 [英] Construct a matrix from a set of coordinates

问题描述

我有一组坐标:

 x     y
65    17
66    17
67    18
68    18
24    26
25    26
26    27
27    27
34    35
35    35

我想构造一个 70 -by- 70 矩阵A，这样A(67,18) = A(68,18) = A(24,26) = ... = A(35,35) = 1，否则A(:,:) = 0.

I want to construct a 70-by-70 matrix A such that A(67,18) = A(68,18) = A(24,26) = ... =A(35,35) = 1, otherwise A(:,:) = 0.

有什么快速的方法可以做到吗?

Is there any quick way to do this?

推荐答案

A=sparse(x,y,1,70,70)

如果您不想使用稀疏矩阵，请对其进行转换:

If you don't want a sparse matrix, convert it:

A=full(A) 

这篇关于从一组坐标构造一个矩阵的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！