Shiny code 002, 003, and 004 Errors with running regression and incorrect argument format

[kcsc4848]

Dear @dataprofessor,

I have been enjoying learning Shiny and R programming, and have appreciated your YouTube videos, and I am struggling with episodes 2-4 (and the associated Code on your github) and I'm not sure where to go to remedy the issue.

In each of the code files provided, I attempt to Run the code and get the following errors:

Error in y - ymean : non-numeric argument to binary operator
In addition: Warning messages:
1: In randomForest.default(m, y, ...) :
The response has five or fewer unique values. Are you sure you want to do regression?
2: In mean.default(y) : argument is not numeric or logical: returning NA

Do you know where I might be able to go, or what resources there are, for me to remedy these errors so that I can continue to learn and apply the knowledge you've shared on these tutorials? So far, I haven't been able to get very far due to these persistent errors spanning each of the R files.

Your help would be greatly appreciated!

Best regards,

Kolbi