[R] misclassification rate

[Doussa]

Hi users
I'm student who is struggling with basic R programming. Would you please
help me with this problem.

"My english is bad" I hope that my question is clear:

I have a matrix in wich there are two colmns( yp, yt)
Yp: predicted values from my model.
yt: true values ( my dependante variable y is a categorical;3 modalities
(0,1,2)
I don't know how to procede to calculate the misclassification rate and the
error Types.

Thank you for answring

Doussa

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