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From: Anil Kumar Palaparthi on 2 Jun 2010 18:09
cell2mat doesn't work for cell arrays containing cell arrays. It only works for cells of various dimensions. But I need a function which works for cell arrays containing cell arrays.

Walter Roberson <roberson(a)hushmail.com> wrote in message <hu6ju7$l61$1(a)canopus.cc.umanitoba.ca>...
> Anil Kumar Palaparthi wrote:
>
> > I have data in cell arrays containing cell arrays. I would like to
> > extract data from these cell arrays and store in a normal array. I am
> > able to do it for a particular case using nested for loops. But I would
> > like to generalize this problem such that I can extract any kind of cell
> > array containing cell arrays just like cell2mat function does. Please
> > let me know if there is any solution to this problem.
>
> If it is to operate "just like cell2mat function does", then why not use cell2mat?
>
> What do you want to happen if there are empty cells? What if some of the cells
> are different shapes than the others? What if some of the cells are different
> data classes than the others?
>
> MyCell2Mat({'hello' [1:3] {} handle(gcf)})
>
> should return exactly what??
From: Bruno Luong on 2 Jun 2010 18:29
>> X={{{{1} {2}} {{3} {4}} {{5} {6}}} {{{7} {8}} {{9} {10}} {{11} {12}}}}

X =

{1x3 cell} {1x3 cell}

>> x = getit(X)

x =

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

>> reshape([x{:}],[2 3 2])

ans(:,:,1) =

1 3 5
2 4 6


ans(:,:,2) =

7 9 11
8 10 12

>> c={'hello' [1:3] {} handle(gcf)}

c =

'hello' [1x3 double] {} [1x1 figure]

>> getit(c)

ans =

'hello' [1x3 double] [1x1 figure]

% Bruno
From: Anil Kumar Palaparthi on 2 Jun 2010 18:44
"Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <hu6m02$ids$1(a)fred.mathworks.com>...
> >> X={{{{1} {2}} {{3} {4}} {{5} {6}}} {{{7} {8}} {{9} {10}} {{11} {12}}}}
>
> X =
>
> {1x3 cell} {1x3 cell}
>
> >> x = getit(X)
>
> x =
>
> [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]
>
> >> reshape([x{:}],[2 3 2])
>
> ans(:,:,1) =
>
> 1 3 5
> 2 4 6
>
>
> ans(:,:,2) =
>
> 7 9 11
> 8 10 12
>
> >> c={'hello' [1:3] {} handle(gcf)}
>
> c =
>
> 'hello' [1x3 double] {} [1x1 figure]
>
> >> getit(c)
>
> ans =
>
> 'hello' [1x3 double] [1x1 figure]
>
> % Bruno

Thanks for your reply. This helps a lot. But how would I generalize the dimensions of the cells i.e [2,3,2] in this case. I want it to work for any kind of cell array containing cell arrays.

-Anil.

From: Bruno Luong on 2 Jun 2010 19:21
Hack change GETIT to return the size:

function [c sz] = getit(c)
if iscell(c)
d = size(c,2);
[c sz] = cellfun(@getit, c, 'UniformOutput', 0);
c = cat(2,c{:});
sz = [sz{1} d];
else
c = {c};
sz = [];
end

end % getit

>> X={{{{1} {2}} {{3} {4}} {{5} {6}}} {{{7} {8}} {{9} {10}} {{11} {12}}} ...
{{{13} {2}} {{3} {14}} {{5} {16}}} {{{17} {8}} {{9} {20}} {{11} {32}}}}

X =

{1x3 cell} {1x3 cell} {1x3 cell} {1x3 cell}

>> [c sz]=getit(X)

c =

Columns 1 through 13

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]

Columns 14 through 24

[2] [3] [14] [5] [16] [17] [8] [9] [20] [11] [32]


sz =

1 2 3 4

>> c=reshape([c{:}],sz(2:end))

c(:,:,1) =

1 3 5
2 4 6


c(:,:,2) =

7 9 11
8 10 12


c(:,:,3) =

13 3 5
2 14 16


c(:,:,4) =

17 9 11
8 20 32

% Bruno
From: Anil Kumar Palaparthi on 2 Jun 2010 20:05
"Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <hu6p1j$aam$1(a)fred.mathworks.com>...
> Hack change GETIT to return the size:
>
> function [c sz] = getit(c)
> if iscell(c)
> d = size(c,2);
> [c sz] = cellfun(@getit, c, 'UniformOutput', 0);
> c = cat(2,c{:});
> sz = [sz{1} d];
> else
> c = {c};
> sz = [];
> end
>
> end % getit
>
> >> X={{{{1} {2}} {{3} {4}} {{5} {6}}} {{{7} {8}} {{9} {10}} {{11} {12}}} ...
> {{{13} {2}} {{3} {14}} {{5} {16}}} {{{17} {8}} {{9} {20}} {{11} {32}}}}
>
> X =
>
> {1x3 cell} {1x3 cell} {1x3 cell} {1x3 cell}
>
> >> [c sz]=getit(X)
>
> c =
>
> Columns 1 through 13
>
> [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]
>
> Columns 14 through 24
>
> [2] [3] [14] [5] [16] [17] [8] [9] [20] [11] [32]
>
>
> sz =
>
> 1 2 3 4
>
> >> c=reshape([c{:}],sz(2:end))
>
> c(:,:,1) =
>
> 1 3 5
> 2 4 6
>
>
> c(:,:,2) =
>
> 7 9 11
> 8 10 12
>
>
> c(:,:,3) =
>
> 13 3 5
> 2 14 16
>
>
> c(:,:,4) =
>
> 17 9 11
> 8 20 32
>
> % Bruno

Thanks Bruno...you are amazing.....
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