create a matrix with numbers from vector

2019 2 13
3 个回答
回答已采纳
更新时间：2019 2 13
3 次查看（30 天）

0 个投票

i have a vector as
v = [ 1 1 1 2 2 2 3 3 4]
i wanted to create a new matrix as
M = [
1 1 1 0 0 0 0 0 0;
0 0 0 1 1 1 0 0 0;
0 0 0 0 0 0 1 1 0;
0 0 0 0 0 0 0 0 1];
how to do it?

请先登录，再回答此问题。

 采纳的回答

madhan ravi
madhan ravi 2019-2-13

1 个投票

v = [1 1 1 2 2 2 3 3 4];
u=unique(v);
R=arrayfun(@(x)v==u(x),1:numel(u),'un',0);
M=+vertcat(R{:})
Gives:
M =
1 1 1 0 0 0 0 0 0
0 0 0 1 1 1 0 0 0
0 0 0 0 0 0 1 1 0
0 0 0 0 0 0 0 0 1

更多回答（2 个）

KSSV
KSSV 2019-2-13

0 个投票

N = zeros(3,3,3) ;
for i = 1:3
N(i,:,i) = 1 ;
end
M = reshape(N,3,[])

2 个评论
显示 无 隐藏 无

KSSV
KSSV 2019-2-13
Give Example....by the way what is use of v here?
KSSV
KSSV 2019-2-13
v = [ 1 1 1 2 2 2 3 3 4] ;
v = reshape(v,[],3)' ;
N = zeros(3,3,3) ;
for i = 1:3
N(i,:,i) = v(i,:) ;
end
M = reshape(N,3,[])

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Dynamic System Models 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