How I can choose randomly value from cell?

>> SI

SI =

1×2 cell array

[1×2 double] [1×2 double]

>> for i=1:numel(SI)

disp(SI{i});

end

1 2

2 3

I want to choose value randomly from SI

for example the value is just one value among 1 2 like 1 or 2

Answer 1

[David Hill]

Why not just,

a=cell2mat(SI);
b=a(randi(length(a)));%b is a random value inside all of SI

[Mira le]

can I use it in struct?

[Mira le]

Cell contents reference from a non-cell array object.

Error in cell2mat (line 42)

cellclass = class(c{1});

Error in Evaluation (line 87)

a1=cell2mat(TI(q).Si);

This error appear when i use cell2mat

TI is struct and Si is field of TI of type cell

Answer 2

[Image Analyst]

Here's one way, if you need to get the value within a loop where you're doing other things:

SI = {[1, 2], [2, 3]}
for k = 1 : length(SI)
	% Extract the numerical array from the cell.
	thisCellsContents = SI{k};
	% Get a random index from that array
	randomIndex = randperm(numel(thisCellsContents), 1);
	% Get the value from the array.
	theValues(k) = thisCellsContents(randomIndex);
	% Show what we got
	fprintf('Randomly picked %f from cell #%d\n', ...
		theValues(k), k);
end
% Show all the values in the command window:
theValues

For example, you'll see:

SI =

1×2 cell array

{1×2 double} {1×2 double}

Randomly picked 2.000000 from cell #1

Randomly picked 3.000000 from cell #2

theValues =

2 3

[Mira le]

Thanks a lot , it works