MATLAB: Error while evaluating UIControl Callback

Question

function gcopt_Callback(hObject, eventdata, handles)
gen = str2num(get(handles.generator,'String'));
rate = str2num(get(handles.rating,'String'));
outage = str2num(get(handles.outage,'String'));
Data = cell(gen+1, 4);
Data(:,1) = num2cell((0:gen).');
for v = 1:gen+1
    Data(v,2) = rate * Data(v,1);
end
f = figure('Position',[440 500 461 146]);
t = uitable(f);
t.ColumnName = {'User Input','Capacity Out','Capacity Available','Probability'};
t.Data = Data;
set(t,'ColumnWidth',{120});
t.Position(3) = t.Extent(3);
t.Position(4) = t.Extent(4);

I'm having this error when I'm trying to multiply the data in the for loop.

Answer 1

You cannot multiply cells, but only the contents:

for v = 1:gen+1
  Data{v,2} = rate * Data{v,1};   % Curly braces
end

Or:

Data(:,2) = num2cell(rate * (0:gen).');