how to extract the labels from the prdataset

I am tring to use dd_tools to do svdd calssification .I do not know how to get the result.please help who is familiar with dd_tools.

a = gendatb([30 30]);

% make the second class the target class and change the labels:

a = oc_set(a,'1');

% only use target class:

a = target_class(a);

% generate test data:

b = oc_set(gendatb(200),'1');

% train svdd

w=svdd(a,0.1,3);

%test svdd

c=b*w.

how can I see the result of c.i.e. the labels of c. for example, the real labels of c is 1 1 -1 -1 . the output is 1 1 1 1,so that i know that c_3 and c_4 was classified into wrong class.