assign subscrips to vectors

I have 5 vectors yt1, yt2, yt3,yt4,yt5 of size 200*1.

I need to assign subscripts so that I can call the vector I want in side a loop.

Can you please help me with this?

Thanks

Answer 1

[Cedric]

You probably want something like

 yt = [yt1, yt2, yt3, yt4, yt5] ;

and then use

 yt(:,k)

in the loop, where k is the loop index. If yt's were not all the same dimension, you could use a cell array:

 yt = {y1, y2, y3, y4, y5} ;

and then use

 yt{k}

in the loop.

If you want to avoid copies/aggregation, just define directly the matrix the cell array instead of defining yt1 to yt5, e.g.

 yt = zeros(200,5) ;     % Prealloc.
 yt(:,1) = ... whatever computation you used to define yt1
 yt(:,2) = ... whatever computation you used to define yt2
 ..

or

 yt{1} = ... whatever computation you used to define yt1
 yt{2} = ... whatever computation you used to define yt2

[dav]

thank you everyone!

[Cedric]

You're welcome, please check the last EDITs that I made (worded a little better, eliminated typos).

Answer 2

[Youssef Khmou]

hi, try :

 N=200;
 for n=1:N
 yt1(n)=.............
 yt2(n)=.......
 .....

 end

[dav]

thanks, but I need to call the WHOLE vector inside the loop first.

[Youssef Khmou]

yes, say that i want to add the vector yt1 10 times

 yt1=randn(100,1);
 N=10;
 S=zeros(size(yt1));
 for n=1:N
 S=S+yt1;
 end

[dav]

I mean something like the following:

For m=1:5

ym=ytm;

end

where ytm is a full vector for m=1,2..5

[Youssef Khmou]

alright, i dont think that is possible but you can construct a matrix that contains the vectors :

 yt1=rand(200,1);
 yt2=rand(200,1);
 yt3=rand(200,1);
 yt4=rand(200,1);
 yt5=rand(200,1);

 Y=[yt1';yt2';yt3';yt4';yt5'];

 for m=1:5
 ym=Y(m,:);
 end

ok?

Answer 3

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F