How to make a loop

Hello! I have a loop and I cannot configure it correctly

x=(0:1:100);
n=length(x);
                 
for i=1:10
y=data(:,i);  % data matrix 100000x10
end

with this format, the matrix considers all the values ​​for me, but I only need those that fall in length n

for i=1:n
y=data(101,i);  % data matrix 100000x10
end

my task is to count the required number of lines, but I just can’t get such an option

[Rik]

What do you mean? You really need to make your question as clear as possible: describe your input and describe the required output. Also be aware that using length is a bad habit. You should either use numel or the size(A,dim) syntax.

[Shubham Gupta]

but I only need those that fall in length n

You want nth row element of each column

y = data(n,:);

or you want nth row element of specific column

specific_column = 2;
y = data(n,specific_column);

Or you want element from each column with a gap equal to n

y = data(n:n:end,:);

Not really sure what you want to achieve but I hope above code helps you out !

Answer 1

[KALYAN ACHARJYA]

"with this format, the matrix considers all the values ​​for me, but I only need those that fall in length n"

x=(0:1:100);
n=input('Enter the required Length');  
for i=1:n
y(i)=x(i);  
end
y

Without Loop:

x=(0:1:100);
n=input('Enter the required Length');          
y=x(1:n)

*Please note that n must be same or smaller than actual x length.

[Rik]

This misses the point that the data is actually a matrix, so this probably isn't the solution.

[KALYAN ACHARJYA]

May be, but If we consider the data, then there is no role of x

n=input('Enter the required Length');          
y=data(1:n)