How to access the index of the cell elements

Hey all,

Hope everyone doing good. I have a small doubt in accessing the index of a cell element in a cell array.

I have a cell array,

A = {1 2 'Node1'; 3 4 'Node2'};

p = cell2mat(X(:,1));

%q = cell2mat(X(:,2));

disp(p);

%disp(q);

T_Vorgabe = zeros(1,length(f));

for plotnumber = 1:n

c = find(p == plotnumber,1);

if ~isempty(c)

c = plotnumber;

% Here I need to get the index of the cell element, which means plotnumber or p.

end

end

My question is how to find the index of the cell element of a first column.

for an example if plotnumber is 3, index of 3 is 2,1.

Any suggestions and answered are most welcomed

Thanks in advance

[KALYAN ACHARJYA]

Suppose a cell array

sanmple_stuc={[1 2 3 4],[4 5 6],[ 6 7 8]}

Now you are looking for the index of respective array element? Yes, plear clarify?

Say 6 is which which cell array and respective index positions??

[surendra kumar Aralapura mariyappa]

@ Kalyan acharjya,

This is my cell array,

A = {1 2 'Node1'; 3 4 'Node2'};

Now I just need to access the first column of the cell array like this.using this A{:,1}.

p = cell2mat(A(:,1));

T_Vorgabe = zeros(1,length(f));

for plotnumber = 1:n

c = find(p == plotnumber,1);

if ~isempty(c)

c = plotnumber;

% some other calculations

% Here I need to get the index of the cell element, which means plotnumber or p.

end

end

When the plotnumber is 1, c = plotnumber, when the plotnumber is 3, c = plotnumber,

So Now I need to know the index of this two number inside the cell array for the later use.

Just like A{1,1} = 1; A{2,1} = 3. just the index of the first column cell elements.

Thanks in advance

Answer 1

[Vimal Rathod]

Hi I understand that you want to find the index of any element in a cell and from the example you gave, I assume that the element whose index to find is a number. You can use the “find function” to find the element index in the cell array.

% Making a cell as an array using [A{:}]. 
% Using find function on that can help you out. 
A = {1,2,'Node1';3,4,'Node2'}; 

% this will return the index 2 which is a matlab version of indexing 
%Using column first and row as the second input as ':' operator prints  
%the cell in column major order. 
[column,row] = find([A{:}] == 3); 

You can refer the find function documentation here

https://www.mathworks.com/help/matlab/ref/find.html

You can also refer to a similar problem here

https://www.mathworks.com/matlabcentral/answers/84242-find-in-a-cell-array

If you want to find the index of string in the cell you can use “for loop” to loop through the elements.