Elementwise diff() with an condition

I have an array of cells which contains numeric arrays of different lengths, lets call that array X. I want to write a function that writes the diff(cell2mat(X(i))) to and array of cells Y(i). The problem is when I want to add a condition i.e. only write the diff of two elements in the result vector when the difference is <= B. Below my code:

 function[Y] = diffleq2(X)
 len = length(X);
 for i = 1:len
     Y(i) = {diff(cell2mat(X(i)))};
 end

X is of the form of

 X = {[1,2,4,5],[23,12,13]};

just with a lot more cells. Obviously the new function would look like this

 function[Y] = diffleq2(X,B)

Answer 1

[ChristianW]

X = {[1,2,4,5],[23,12,13]};
Y = cellfun(@diff,X,'un',0);
B = 1.5;
Ycut = cellfun(@(x) x(abs(x)>B),Y,'un',0);

[Philipp]

Thanks for the answer. The first part works nicely (I didn't know about the cellfun function) - this is great.

But I still have problem with the last line where I want to remove all entries > B. Ycut is just the same as Y. Can you explain me the syntax of the function you passed as argument?

Edit: Figured it out - thanks again :)

Answer 2

[Azzi Abdelmalek]

X = {[1,2,4,5],[23,12,13]}
B=1
for k=1:numel(X)
  b=diff(X{k})
  b(b>B)=[]
  out{k}=b
end