Dataset intersection

Hello , i have two datasets with stocks , a large one that contains all the stocks at my disposal (and also has their monthly returns) and a smaller one which contains few of the stocks of the large one. I want to take those few stocks from the large set along with their returns. I have tried newset=largeset(largeset.Stock==smallset.Stock,{'Stock','July'}) to get the stocks along with their July returns but i get the : Undefined function or method 'eq' for input arguments of type 'cell' error. Any help would be appreciated.

Answer 1

[Fangjun Jiang]

LargeStock={'a',0.1;'b',0.2;'c',0.3;'d',0.4;'e',0.5};
MyStock={'b','d'};

Index=ismember(LargeStock(:,1),MyStock);
MyStockAndReturn=LargeStock(Index,:);