[c] = confusion(t,y) and not classified observations
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Hi
[c] = confusion(t,y)
[c] its Confusion value = fraction of samples misclassified
but output of code bellow can be values:
1)classified correctly
2)classified incorrectly
3)not classified
net = fitnet(hl,trainFcn)
[net,tr] = train(net,x,t);
y = net(x)
[c] = confusion(t,y)
if im getting c = 0 it mean all values were classified correctly but it will consider values which were not classified ?
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Answers (1)
Srivardhan Gadila
on 28 Mar 2020
Edited: Srivardhan Gadila
on 28 Mar 2020
The fitnet function is used for regression. The confusion matrix is used for classification problems.
Function fitting is the process of training a neural network on a set of inputs in order to produce an associated set of target outputs. After you construct the network with the desired hidden layers and the training algorithm, you must train it using a set of training data. Once the neural network has fit the data, it forms a generalization of the input-output relationship. You can then use the trained network to generate outputs for inputs it was not trained on.
3 Comments
Srivardhan Gadila
on 29 Mar 2020
@Tomasz Kaczmarski, Try the following in MATLAB:
help simpleclass_dataset
[x,t] = simpleclass_dataset;
plot(x(1,:),x(2,:),'+')
net = patternnet(10);
net = train(net,x,t);
view(net)
y = net(x)
plotconfusion(t,y)
% or use the below one
[c,cm,ind,per] = confusion(t,y)
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