I got an error ignoring extra legend entries.

x = [data2bl;data3bl;data4bl;data5bl];

for index = 1:2000

    if index <= 500
        Origin(index,:) = 'Smell1';
    end
    if index >=501 && index <=1000
        Origin(index,:) = 'Smell2';
    end
    if index >=1001 && index <=1500
        Origin(index,:) = 'Smell3';
    end
    if index >=1501 && index <=2000
        Origin(index,:) = 'Smell4';
    end
end

%Dendrogram plot

figure(12)

[d,p,stats]= manova1(x,Origin);

manovacluster(stats,'single');

title('Dendrogram plot of Basic Smell');

ylabel('Similarity level');

xlabel('Sample type')

grid on;

h=legend('Banana','Rose','Strawberry','Vanilla',2);

Answer 1

[Thorsten]

 h = legend({'Banana' 'Rose' 'Strawberry' 'Vanilla'})

[Vikneswaran Ramakrishnan]

Still the same error

Warning: Ignoring extra legend entries.

> In legend at 286

[Thorsten]

It's not an error, but a warning. It says that you have fewer curves plotted than you have labels in your legend.