Index a cell array with an cell

Hi all

I have a cell array

C {1x2}

C{1} 1x180 values

C{2} 1x1260 values

and B with the same size containing zeros and ones. Now I want to do something:

C{B}=[]; to delete all entries of C where B contains a one whearas if B contains a zero all values should be maintained.

How can i do this?

Thank you!

Answer 1

[Jorg Woehl]

Hi Christian,

You can pick the corresponding entries for each of the cells of C as follows:

C{i}(B{i}==0)

The results are then easily combined into a new cell array, as shown in this short example:

C = {[1 2 3], [10 11 12 13 14 15 16]}
B = {[0 1 1], [ 0  1  0  0  1  1  0]}
newC = {C{1}(B{1}==0), C{2}(B{2}==0)}

The newC cell array now contains {[1], [10 12 13 16]}.

[CSCh]

Hi Jorg,

thank you for your answer.

With that: C{i}(B{i}==0), your example works. Howerver, for me

i get the following error:

binary operator '==' not implemented for 'cell' by 'scalar' operations.

Maybe it has something to do with my cell structure? here is an abstract from C

C{1}(1:2) =

{

[1,1] =

{

[1,1] = 0.40

}

[2,1] =

{

[1,1] = 0.70

}

}

....

My B is B{1}(1:2)

[1,1] = 0

[1,2] = 0

}

...

[Jorg Woehl]

Could you send a command for building (shortened) examples for the cell arrays C and B, like in my code above? Sending the output from

C
B

may also be helpful, as a start.

I am still not sure how your cell arrays are structured; it looks like C may be a 1-by-2 (or 2-by-1?) array of cells, each containing a cell array of scalars... but whatever I tried, I don't get the same error you are referring to. An example would make it clear what we are dealing with.

[CSCh]

Joerg, many thanks for your effort and your help. I don't know how to create such a cell array. To don't loss so much time, I made a work around with a loop (which I actually wanted to avoid). Thank you

[Jorg Woehl]

Sounds good - cell arrays can indeed be tricky to create and work with. Thanks for the follow-up.