William Chiu
William Chiu
### Issue Description and Expected Result Related to #480. `dbWriteTable` returns an error message when appending data to an existing table in Snowflake. Error is specific to the Snowflake ODBC...
I'm having a hard time finding the R code for figure 16.2 
### Description I want to generate two legends on a **single** plot object. However, using `addLegend(..., on=0)` renders a new plot object each time `addLegend` is called. ### Expected behavior...
It appears that averaging RMSE (rather than MSE) over V-folds introduces a small bias to the test set error estimate. Averaging RMSE over V-folds appears to underestimate the "true" test...
How do you assess whether a data set has high dimensionality? For example, p > n is an obvious case of high dimensionality (potential feature set is larger than the...
I think the footnote could be improved, so that non-English speakers do not believe the validation set was sampled from the training and test sets. > As noted in the...
The example below was supposed to show K=5 is better than K=1. However, the **test error** for K=1 is much lower than K=5. > The **test set sample’s sale price...
In section 3.5, I believe the phrase should be "variance-bias tradeoff" rather than "variance-base tradeoff". > The tuning parameters (sometimes called hyperparameters27) are important since they often control the complexity...
In section 3.2.1, the book says: > Unfortunately, R^2 can be a deceiving metric. The main problem is that it is a measure of correlation and not accuracy. Yes, this...
Section 3.4.1 talks about "V-Fold Cross-Validation". What was the rationale to use the terminology "V-Fold" rather than the more common "K-Fold"?