What is the mistake, please help

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.

[Matt J]

What evidence is there that it doesn't work properly?

Answer 1

[Mark Whirdy]

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

[Selin Soguksu]

Thank you very much for the answer. It works well :))

Answer 2

[Walter Roberson]

You have the line

new[x]=orj_matr(new_matr,:)

In MATLAB, [] is never used for indexing. Try

new{x} = orj_matr(new_matr,:);

[Selin Soguksu]

When I use like this

new{x} = orj_matr(new_matr,:);

An error message comes "* Cell contents assignment to a non-cell array object*"

[Matt J]

Only because "new" has a prior definition floating around