I have a data frame that lists a series of customer evaluations for different products (each record is an evaluation / note). I need to do some boxplots with the evaluations of some specific products (the ids of those products are in a vector), but not all of the products. I'd like to know how I say in R: Just get the product ratings have the ids in that vector and mount a boxplot for each product. Can anyone help me?
Thank you!