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Update quiz_4.R #1

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5 changes: 3 additions & 2 deletions quiz_4.R
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Original file line number Diff line number Diff line change
Expand Up @@ -146,9 +146,10 @@ pred = predict(model, testing)
RMSE = sqrt(sum((pred - testing$CompressiveStrength)^2))

predins = predict(model, training)
RMSEins = sqrt(sum((predins - training$CompressiveStrength)^2))
RMSEins = sqrt(sum((predins - training$CompressiveStrength)^2)/length(predins))
#this results will be close to the 2016 options, that are a little different I think because of the different packages versions

# RMSE = 107.4401, this does not match any of the options...
# It did however match the value of 11543.39 which is the MSE not the RMSE