[R] Is there a function for this?

From: Feng Qiu <hustqiufeng_at_sohu.com>
Date: Wed 03 Jan 2007 - 13:40:58 GMT

Hi everybody, I'm trying to do a statistic on the error rate of a prediction algorithm.

suppose this is the real category
[good, good, bad, bad, good, good, bad, bad]
this is the predicted category
[good, bad, bad, bad, good, good, good, bad]

I'm trying to do a statistic on the error rate for each group("good","bad"): what percentage of instances are predicted incorrectly for each group ? Of course I can write a loop to do that, but is there a easy way to do that?

Thank you!

Best,

Feng



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