How to skip the legends for some series of data that's actually Null after some Calculation?

Hello, everyone. Here is the problem I am facing. Say I have 3 series of data, but some of the series could be of length 0. As I plotted them all on the same figure, I want to legend them correctly, how should I do that more compactly? Below is what I got ( notice the data are all in the structure Performance)

if cellfun('isempty', Performance.Apple)
  legend('Orange', 'Banana');
elseif cellfun('isempty', Performance.Orange)
  legend('Banana', 'Orange');
elseif cellfun('isempty', Performance.Banana)
  legend('Apple', 'Orange');
elseif cellfun('isempty', Performance.Apple) & cellfun('isempty', Performance.Orange)
  legend('Banana');
elseif cellfun('isempty', Performance.Apple) & cellfun('isempty', Performance.Banana)
  legend('Orange');
elseif cellfun('isempty', Performance.Orange) & cellfun('isempty', Performance.Banana)
  legend('Apple');
end

So you get what I'm trying to do, right? I know there must be a trick to do these smartly, please help me.

Answer 1

[Liwei Dai]

LegendVector = {'Apple', 'Orange', 'Banana'};
ActualLegend = [~cellfun('isempty', Performance.Apple),...
  ~cellfun('isempty', Performance.Orange), ...
  ~cellfun('isempty', Performance.Banana)];
LegendVector = LegendVector(ActualLegend);
legend(LegendVector);

This is by far what came to my mind, is there any other way to simplify the redundent cellfun in my code?