extracting numbers from a cell

SP={{{1,4,5,6},{2},{3}}}
SP =
  1×1 cell array
{1×3 cell}
d=SP{1}
d =
  1×3 cell array
    {1×4 cell}    {1×1 cell}    {1×1 cell}
d{1}
ans =
  1×4 cell array
    {[1]}    {[4]}    {[5]}    {[6]}

I want d{1} to be

1 4 5 6

to be able to use these as indices of a matrix.

Answer 1

[Paolo]

d = SP{:}
>>[d{1}{:}]

1     4     5     6

[asim nadeem]

I used cell2matrix.Thanks

Answer 2

[Image Analyst]

This will do it

SP={{{1,4,5,6},{2},{3}}}
d=SP{1}
d{1} = [d{1}{:}]

but that is a really crazy number storage and I don't recommend it at all. You have a single cell SP with another single cell in side of it. Then inside that cell is a 3-by-1 cell array. Then each of the 3 cells in the interior cell array is also a cell, instead of just a regular number. Could you possibly make it any more complicated?

First of all, you should read the FAQ to learn how to use cell arrays: click here

Then you should set it up like this:

SP={[1,4,5,6], [2], [3]}

Then you can say

d1 = SP{1}
d2 = SP{2}
d3 = SP{3}

if you want separate arrays with contents of each cell of SP for convenience in referring to them

[asim nadeem]

Thanks