Chirayu Chamoli questions

Chirayu Chamoli answers

• Tuning two parameters for random forest in Caret package
• counting zeros in columns in data frame in R and express as percentage
• Exclude missing values from model performance calculation
• replace values of a dataframe based on values of the previous rows
• Check if list contains another list in R
• Using tryCatch and rvest to deal with 404 and other crawling errors
• open (not run) and edit a R script from Rstudio console
• Merge two tables on two columns without order of variables playing a role