Abiel questions

• Date labels overlap when putting multiple ggplot plots on single page
• Merging pre-sorted files without reading everything into memory
• Update Plotly Y axis range after setting X axis range
• data.table group by with a filter condition [duplicate]
• Invert Y axis in Highcharts
• Using VBA to put a chart series on the secondary X axis
• Date axis labeling algorithm for Excel
• Get Excel.Application object from Process or hwnd in .NET
• Performance difference between RcppArmadillo and Armadillo
• Construct Numpy index given list of starting and ending positions

Abiel answers