Split values in an cell array by using a threshold

Hello everyone.I have a cell array of variable (A), 1x91.In each cell it has an array of size 256x256.I would like to threshold each array so that elements lesser than or greater than a given threshold value are stored in different variable.Your help is really appreciated.

Answer 1

[Matt J]

One way,

A_lower = cellfun(@(x) x(x<threshold), A, 'uni',0);
A_upper = cellfun(@(x) x(x>threshold), A, 'uni',0);

[Sabari G]

Thanks for your respone.Here i get empty cell array.Myy threshold value is 0.5.

[Sabari G]

It doesnt work.It shows error message like this.can u suggest me another way and I have one doubt in the code..what does the X means in the above code.

Error using cellfun

Input #2 expected to be a cell array, was double instead.

Error in duru (line 36)

A_lower = cellfun(@(x) x(x<threshold), A, 'uni',0);.

[Matt J]

In the case where you got empty matrices, it because none of your data fall below 0.5. In the case where you got error messages, it is because your A variable is not a cell array.

Below is a small example showing that the technique will work when properly applied:

>> A={rand(3), rand(3)}; A{:}

ans =

    0.5407    0.9734    0.1941
    0.8929    0.6006    0.7933
    0.9092    0.8582    0.8144


ans =

    0.5087    0.0331    0.7163
    0.3399    0.1797    0.3758
    0.6815    0.7166    0.3589

>> A_lower = cellfun(@(x) x(x<0.5), A, 'uni',0); A_lower{:}

ans =

    0.1941


ans =

    0.3399
    0.0331
    0.1797
    0.3758
    0.3589

[Sabari G]

Thanks a lot!! It works