Alexander questions

• Solving equations in R similar to the Excel solver parameters function
• Manipulate multiindex column in pivot_table
• predict x values from simple fitting and annoting it in the plot
• How to connect box plot medians with multicategory x axis in plotly python
• Numbering of groups in dplyr?
• 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

Alexander answers