Allan Cameron questions

Allan Cameron answers

• Is there a clean way of converting an Excel location string (e.g. "F3" or "BG5") into an R row-column index?
• Exact dimensions of linetype spacing and size
• remove transparency from grey but keep grey itself
• Detect a specific line from a image using R
• Converting a data frame using a formula
• Counting unique list items
• ggbetweenstats: logarithmic y axis removes grouped analysis from plot
• How to draw an empty ggplot with just the legend?
• Ax=B solving for non-square A
• Passing 'mar' graphical parameter to plot function