Manipulate Cell Arrays

Hi,

I have a problem regarding cell arrays:

I have an cell array named sets of 10 cells. In each cell I want to store arrays with 2 columns and a variable numer of rows. I don`t know how to add a new row into a special cell. I think it is an indexing problem?

sets=cell(1,10);
sets{1,1}=[sets(1,1) [3,3]];

What is wrong with that? So the problem is: how to concatenate a matrix stored in a cell array cell with a new row?

Thanks for your efforts!

Answer 1

[fcarl]

Okay. Problem was solved! it has to be:

sets{1,1}=[sets{1,1} [3,3]];

Answer 2

[Lucas García]

Let's see if I understand your question. First, you say: " In each cell I want to store arrays with 2 columns and a variable numer of rows".

This array can't be a matrix, since matrices must have all the same number of rows. But each column can be placed in a cell:

x = (1:10)';
y = (1:11)';
sets{1,1} = {x,y};

By using the braces, {x,y} , you are creating a cell of size 1x2 in the first position of the cell sets. If you want now to index into the cell sets and add a row no.12 with value 12 in the position where you placed y, you can do the following:

   sets{1,1}{1,2}(12,1) = 12;

This is what you now have in the position 1,1 of cell sets:

>> sets{1,1}

ans = 

    [10x1 double]    [12x1 double]

And this is what you have in second cell contained in the first cell of cell sets:

>> sets{1,1}{1,2}

ans =

     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12