What is the mistake, please help
4 次查看(过去 30 天)
显示 更早的评论
Hello, I have a 10000-10 matrix called orj_matr. I want to randomly select 50 rows from this matrix. But I want this 50 times. So I'll have 50 different 50-10 matrix. For these purpose I used the codes like this:
for x=1:50
Nrows=size(orj_matr,1)
new_matr=randperm(Nrows)
new_matr=new_matr(1:50)
new[x]=orj_matr(new_matr,:)
end
But it doesn't work properly. What is the mistake? Please help me.
采纳的回答
Mark Whirdy
2012-12-12
编辑:Mark Whirdy
2012-12-12
Is the square-bracket in new[x] pseudo-code?
orj_matr = rand(10000,10);
a = NaN(50,10,50);
for i = 1:50
index = randperm(10000);
index = index(1:50)';
a(:,:,i) = orj_matr(index,:);
end
更多回答(1 个)
Walter Roberson
2012-12-12
You have the line
new[x]=orj_matr(new_matr,:)
In MATLAB, [] is never used for indexing. Try
new{x} = orj_matr(new_matr,:);
2 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!