Sylvia Rodriguez questions

• Multiply and average data from two data.frames into one column using R
• Sum rows in columns with column names ending with specific character string (R) [duplicate]
• Substitute p values for stars in data frame in R
• What are the differences between data.frame, tibble and matrix?
• Maximum length of a vector in R is only 349? [duplicate]
• Change single row name in data.frame
• R boxplot, change number of digits in p value using "stat_compare_means"
• Multiply values across each column by weight in another data.frame in R

Sylvia Rodriguez answers