How do I exclude zeros from a matrix?

2013 4 29
2 个回答
回答已采纳
4 次查看（30 天）

0 个投票

How do I exclude zeros from a matrix and create a new matrix? For example:
A = [1 2 0 3 0 4 5 0; 7 0 0 0 2 3 4 1] and I want
A = [1 2 3 4 5 0 0 0; 7 2 3 4 1 0 0 0]
?

请先登录，再回答此问题。

 采纳的回答

Andrei Bobrov
Andrei Bobrov 2013-4-29
编辑：Andrei Bobrov 2013-4-29

0 个投票

s = size(A);
A1 = zeros(s);
for j1 = 1:s(1)
A1(j1,1:nnz(A(j1,:))) = nonzeros(A(j1,:));
end
other variant:
At = A.';
i1 = sum(At~=0);
s = size(At);
A1 = zeros(size(At));
A1(sub2ind(s,i1,1:s(2))) = 1;
out = zeros(s);
out(flipud(cumsum(flipud(A1)))>0) = At(At ~= 0);
out = out.';

更多回答（1 个）

Zhang lu
Zhang lu 2013-4-29

0 个投票

You just show an simple matrix , which has the same zeros in each row. So,if you matirx is this case, the code as first one. else, you can try the second code.
clear all
clc
A =[ 1 2 0 3 0 4 5 0
7 0 0 0 2 3 4 1];
A=A';
New_A=reshape(A(A~=0),[],size(A,2))';
New_A(:,size(A,1))=0
clear all
clc
A =[ 1 2 0 3 0 4 5 0
7 0 0 0 2 3 4 1
1 5 6 5 5 0 0 3];
[m,n]=size(A);
for i=1:m
B=A(i,A(i,:)~=0);
New_A(i,1:length(B))=B;
end
New_A(i,n)=0

类别

在 帮助中心 和 File Exchange 中查找有关 Get Started with Curve Fitting 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