How to plot a confusion matrix for multi-class categorical labels?

I have 17 classes. Targets and outputs are of categorical type (example 'dog', 'cat'). They are N x 1 vectors where N is the number of samples.

How do I plot a confusion matrix for this? I don't think I can use the built in function, 'Plotconfusion(targets,outputs)' because requires the targets and outputs to be matrices.

Answer 1

[Greg Heath]

Convert the categorical labels to a binary equivalent.

Answer 2

[Keith Hautala]

1) Change the categories of both targets and outputs using grp2idx or double.

2) Transpose the results of (1)

3) Use the result of (2) as the targets and outputs as described here: https://www.mathworks.com/matlabcentral/answers/338244-how-can-i-plot-a-confusion-matrix-for-a-multi-class-or-non-binary-classification-problem