GuedesBF questions

GuedesBF answers

• In R, how create new dataframe with number of occurrences of each strings on other dataframe, like a product list and products in basket sold
• Group by and run multiple t tests in R
• Check if a dataframe column contains decimal values
• Remove Rows occurring after a String R Data frame
• Problem using lag() within a mutate() function (tidyverse)
• Loop Over Multiple Environment Objects R
• The simplest way to check for NaNs in columns (R)?
• How delete every 3rd Element of a vector?
• How to change matrix entries using conditional if in R
• R - Remove rows from dataframe that contain only zeros in numeric columns, base R and pipe-friendly methods?