How to create a loop generating bins for the group of data in cell array

Hi everyone,

I am a newby to MathLab and I need some help from the community.

I am trying to figure out how to loop a simple histcounts function.

I have a data set which I separtated into cell arrays with accumarrays

So now I have a cell array GC{121:1} which contain 121 separate matrixes (double values). Each of those matrixes has 2 columns and diferent numer of rows (2 x n matrix ).The first colunm is the number of slice indicating were data were extracted from.

I would like to split each matrix into 10 equal bins by the second column. So far I got to this:

But the loop I wrote dose not work

GC = accumarray(data(:,1),(1:size(data,1)),[],@(x){data(x,:)});
% Distribute x_point column into 6 equally spaced bins..
for i=1:121
[N,edges] = histcounts(GC{i,1},10);
end

[dpb]

What does "does not work" mean, specifically?

Looks like it should work just fine as far as running although you're overwriting the return variables [N,edges] every pass through the loop so at the end you only have the last result....is that the problem?

Save the results in another set of cell arrays.

[Iuliia Myrgorodska]

Yes,

that's exactly the problem I have. Do you know how can I fiix this?

[Iuliia Myrgorodska]

How can I save the result in another set of cel arrys? so that I get the results from all iteration as one set?

Answer 1

[Sriram Tadavarty]

Hi Luliia,

The problem here is that the variables N and edges are overwritten with the latest value each time in the for loop.

You can try the following:

GC = accumarray(data(:,1),(1:size(data,1)),[],@(x){data(x,:)});
% Distribute x_point column into 6 equally spaced bins..
N = cell(1,121);
edges = cell(1,121);
for i=1:121
[N{i},edges{i}] = histcounts(GC{i,1},10);
end

% To access the first value in N, it can be done through N{1}

Hope this helps.

Regards,

Sriram

[Iuliia Myrgorodska]

Awsome, thanks a lot. I couldn't figure the syntaxys))