DJC questions

• Plot multiple ROC curves using a for loop
• Writing multiple dataframes to multiple sheets in an Excel file
• How to count number of non-consecutive values in a column using SQL?
• Changing the color of a specific ring in a radar chart created in plotly
• Using observeEvent in shiny with null values
• Using fluidRow with a conditional statement
• Show tooltip on plotly based on x-axis
• Utilizing a vectors index number when using map
• How to identify and tally intersection items in R
• Referencing other items in a list before it is stored as an object

DJC answers