清空筛选条件
清空筛选条件

How do I reshape a vector into a zero-diagonal matrix?

3 次查看（过去 30 天）
Dan Ibarra
Dan Ibarra 2021-5-12
评论： Dan Ibarra 2021-5-13
I have these vectors:
x=[1;2;3;4;5;6;7;8;9;10;11;12]
y=[1;2;3;4;5;6]
How do I reshape these vectors into:
A =
[ 0 1 2 3
4 0 5 6
7 8 0 9
10 11 12 0]
B=
[0 1 2
3 0 4
5 6 0]

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2021-5-12
x = [1;2;3;4;5;6;7;8;9;10;11;12];
nx = numel(x);
n = ceil(sqrt(nx));
if nx ~= n*(n-1)
error('vector is wrong size to make square out of')
end
A = reshape([reshape([zeros(1, n-1);reshape(x, n, [])],1,[]), 0],n,[]).';

更多回答（1 个）

Chunru
Chunru 2021-5-12
Try this:
x=[1;2;3;4;5;6;7;8;9;10;11;12]
% y=[1;2;3;4;5;6]
m = 4; % matrix size
a = [zeros(m-1,1), reshape(x, m, m-1)' ]'; % 1st (m-1)*(m+1) elements
a = reshape([a(:); 0], m, m)' % add last 0 and reshape
B can be obtained in a similar way.

类别

在 Help Center 和 File Exchange 中查找有关 Statistics and Machine Learning Toolbox 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