# What does "something = cell (size(session,1),1" mean/look like?

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Rosie on 1 Feb 2017
Answered: David J. Mack on 1 Feb 2017
I know the "cell" function creates an array of empty cells and I know that I didn't specify what "session" looks like. But given a matrix for session, what would the above look like? Thanks.

#### 1 Comment

Stephen Cobeldick on 1 Feb 2017
It would give an error, because you have more opening parentheses than closing parentheses. If we fix the missing last parenthesis:
something = cell (size(session,1),1)
will give a cell array with as many rows as session has, and one column.

John D'Errico on 1 Feb 2017
Why not think about it? Look at the inside.
What does this:
size(session,1)
do? If you have no clue, then READ THE HELP for size. Suppose you broke it into two pieces:
K = size(session,1);
something = cell(K,1);
This is essentially identical to the fragment that you show, in terms of what it will do, except that it also creates a spurious variable called K. But that is not really relevant. If you know what size does, AND you understand what the cell function does, then what does it tell you?
When you see a problem too difficult for you to understand, break it down into pieces.

David J. Mack on 1 Feb 2017
Hey Marie,
the above creates a column cell with n elements, where n are the number of rows of session.
Cheers, David