Will Phillips questions

• using bold in mtext on string coming from vector element
• Efficiencies for nested for loop
• Find the percentage of values that meet some criterion by columns of a matrix
• Conditional duplicate elimination
• grouping by date ranges
• R Identifing text string within column of dataframe
• Combining matrices by alternating columns
• updating column in one dataframe with value from another dataframe based on matching values

Will Phillips answers