how can i put value of cell in vector?

this error appear during the run of my program

"Cell contents reference from a non-cell array object."cell

U=[ ]

S={1 ,2 ,3}

for i=1:numel(S)

U=[U S{i}];

end

U = unique(U,'first');

Answer 1

[Star Strider]

Two options that come quickly to mind:

S={1 ,2 ,3};
U = [S{:}]
U = cell2mat(S)

Obviously these only work if the cell contents can be appropriately concatenated. If they cannot be, it is best to leave the cell array as a cell array, and address its contents as needed.

[Mira le]

It doesn't work, the error still appear

[Star Strider]

The code you posted runs without error in R2019b, as does the code I posted.