LDA for 2 classes only, why have 3 classes?

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Matlaber
Matlaber el 5 de Mzo. de 2019
Hi,
I am trying to use the original code Link here LDA link
I found strange is the dataset have 3 classes, but the plotted graph is X as input and Y as output. The graph does not do any dimensional reduction and classification.
%Load Data
data=load('iris_dataset');
X = data.irisInputs';
T = data.irisTargets';
L = vec2ind(T')';
[Y, W, lambda] = LDA2(X, L);
%Plot Results
figure;
D = size(X,2);
for d=1:D
% Original Data
subplot(D,2,2*d-1);
plot(X(:,d));
ylabel(['x_' num2str(d)]);
if d==D
xlabel('Sample Index');
end
if d==1
title('Original Data');
end
grid on;
% Transformed Data
subplot(D,2,2*d);
plot(Y(:,d));
ylabel(['y_' num2str(d)]);
if d==D
xlabel('Sample Index');
end
if d==1
title('LDA Output');
end
grid on;
end
Thank you

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