Alexander questions

• Reading files with multiple delimiter in column headers and skipping some rows at the end
• Draw geom_vline in discrete x axis
• Drop columns contains certain strings while reading data : python
• removing white space in geom_tile and matching geom_vline&hline locations
• Math symbol error in geom_text
• Selecting and renaming columns at the same time
• Remove groups that contain certain strings
• kmeans clustering in grouped data
• How to output the columns with the maximum value
• Dual y axis (second axis) use in ggplot2

Alexander answers