MATLAB: How to find the element in on boundary or interior

a=[3 4 5;6 1 2]

I want to know if the element 2 is on boundary or interior?

how will i check?

Best Answer

tf = false(size(a)) 
tf(2:end-1,2:end-1) = true 
a(tf) % elements in interior
a(~tf) % elements on boundary

Related Solutions

MATLAB: How to compare elements of rows within cell array

for k=1:size(array1,1)
    for j=1:numel(array1{k,1})
        for i=1:size(array1,1)
            [~,idx(i,j,k)]=ismember(array1{k,1}(j),array1{i,1});
        end
        ResultantArray{k,j}=setdiff(find(idx(:,j,k)),k);
    end
end

MATLAB: Find how many times same element is repeated

A=[9,8;7,6;1,2;2,4;3,4;3,4;4,7;6,7;8,6;9,8;7,6];
a = unique(A,'rows');
R = zeros(size(a,1),1);
for k = 1:size(a,1)
    R(k) = nnz(ismember(A,a(k,:),'rows'));
end
Result = table(a,R,'VariableNames',{'Rows','Times'})

Gives:

Result =
  8×2 table
     Rows     Times
    ______    _____
    1    2      1  
    2    4      1  
    3    4      2  
    4    7      1  
    6    7      1  
    7    6      2  
    8    6      1  
    9    8      2  
>>

Best Answer

Related Solutions

MATLAB: How to compare elements of rows within cell array

MATLAB: Find how many times same element is repeated

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