MATLAB: How to remove empty cell array contents

cellisempty

Hello, I've got a cell array, lets say:

R = 
    [ 691x2 double]
    []
    []
    []
    []
    [  12x2 double]
    [  11x2 double]
    []
    []
    [ 112x2 double]
    [  13x2 double]

Does anyone know of a quick way I could remove the non-zero elements of the cell array? This cell array will be a different length and will have a different number of non-zero elements each time, dependent on another loop

Thanks, Jim

Best Answer

To remove empty cell array contents (title of your question) :

 R(~cellfun('isempty',R))

Related Solutions

MATLAB: Remove zero entries from cell arrays

points = {[-24.7697910000000,-15.8191235000000],0,[-12.6771670000000,20.4587480000000],0;0,[-20.6771670000000,-3.54125200000000],[-11.9803417500000,-14.5401785500000],0;0,[-20.6771670000000,-3.54125200000000],[4.32283300000000,-1.04125200000000],0;0,[13.0196582500000,-12.0401785500000],0,[-24.7697910000000,-15.8191235000000];[-11.9803417500000,-14.5401785500000],0,[4.32283300000000,-1.04125200000000],0;0,[-12.6771670000000,20.4587480000000],0,[13.0196582500000,-12.0401785500000];}
p2 = num2cell(points,2);
C = cellfun(@(c)cellfun(@(x)x(x~=0),c,'uni',false),p2,'uni',false);
for ii = numel(C):-1:1
    Cc = C{ii};
    C(ii) = {Cc(cellfun(@(c)~isempty(c),Cc))};
end

MATLAB: Cell comparison with other cells in different rows

For the record, it would be better to use arrays rather than cell arrays for the coordinates (in fact for the whole thing, but that's ok).

Anyway, this should do the trick:

ep = {{-24.7697910000000,-15.8191235000000},{-20.6771670000000,-3.54125200000000};
    {-12.6771670000000,20.4587480000000},{-20.6771670000000,-3.54125200000000};
    {-11.9803417500000,-14.5401785500000},{13.0196582500000,-12.0401785500000};
    {-11.9803417500000,-14.5401785500000},{-24.7697910000000,-15.8191235000000};
    {4.32283300000000,-1.04125200000000},{-12.6771670000000,20.4587480000000};
    {4.32283300000000,-1.04125200000000},{13.0196582500000,-12.0401785500000}};
n = size(ep, 1);
V = nchoosek(1:n, 2);
key = false(n, 1);
% Convert the points to vectors
ep = cellfun(@(x) cell2mat(x), ep, 'UniformOutput', false);
is_same = @(x, y) norm(x - y, inf) / norm(x, inf) < 100*eps;
for i = 1:size(V, 1)
   % Do the four comparisons
   i1 = V(i,1);
   i2 = V(i,2);
   key(i) = is_same(ep{i1, 1}, ep{i2, 1}) || ...
            is_same(ep{i1, 1}, ep{i2, 2}) || ...
            is_same(ep{i1, 2}, ep{i2, 2}) || ...
            is_same(ep{i1, 2}, ep{i2, 2});
end
matches = V(key, :);

Best Answer

Related Solutions

MATLAB: Remove zero entries from cell arrays

MATLAB: Cell comparison with other cells in different rows

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