iteration in bootstrap method

HI guys, i have a 1*39 cell array (M) and each cell contains different dimension numeric arrays(e.g. 74*3,68*3...), for each column i want to resample it with bootstrap. I guess boot function could only be applied on array numbers so i created M_1 to capture each column in the cell array. (i also tried to convert the whole cell table to array but did not succeed.) How can i put the code down below into a for loop and get the numeric arrays? Thank you so much if you could help.

M_1=M{1,1}(:,2);
[stats,bootsam]= bootstrp(100,@(x)[mean(x) std(x) moment(x,4) moment(x,3)],M_1);

Answer 1

[Adam Danz]

Follow this example. I loop through all elements of M and then all columns within each element of M.

% fake data
M = {rand(74,3); rand(68,3); rand(22,4)}; 
% get number of columns in each M
nCols = cellfun(@(x)size(x,2), M); 
% initialize loop vars
stats = cell(length(M), max(nCols)); 
bootsam = stats; 
% Loop through your cell array
for i = 1:length(M)                     %for each element of M
    for j = 1:size(M{i},2)              %for each column of M{i}
        [s,b]= bootstrp(100,@(x)[mean(x) std(x) moment(x,4) moment(x,3)],M{i}(:,j)); 
        stats{i,j} = s;                 %store values
        bootsam{i,j} = b;               %store values
    end
end

% To get the results for M{1} column(2)
stats{1,2}
bootsam{1,2}

[Yu Zhang]

Thank you so much!