The Append( ds1, ds2 ) command appends the DataSeries df2 to the DataSeries df1, and returns the newly constructed DataSeries.

It is required that the row labels for the DataSeries df1 and df2 be disjoint.

$\mathrm{ds1}≔\mathrm{DataSeries}\left(\left[1\,2\,3\right]\,'\mathrm{labels}'=\left['a'\,'b'\,'c'\right]\right)$

$\mathrm{ds1}≔\left[\begin{array}{cc}a& 1\\ b& 2\\ c& 3\end{array}\right]$

$\mathrm{ds2}≔\mathrm{DataSeries}\left(\left[-1\,-2\,-3\,-4\,-5\right]\,'\mathrm{labels}'=\left['d'\,'e'\,'f'\,'g'\,'h'\right]\right)$

$\mathrm{ds2}≔\left[\begin{array}{cc}d& \mathrm{-1}\\ e& \mathrm{-2}\\ f& \mathrm{-3}\\ g& \mathrm{-4}\\ h& \mathrm{-5}\end{array}\right]$

$\mathrm{ds}≔\mathrm{Append}\left(\mathrm{ds1}\,\mathrm{ds2}\right)$

$\mathrm{ds}≔\left[\begin{array}{cc}a& 1\\ b& 2\\ c& 3\\ d& \mathrm{-1}\\ e& \mathrm{-2}\\ f& \mathrm{-3}\\ g& \mathrm{-4}\\ h& \mathrm{-5}\end{array}\right]$

$\mathrm{ds3}≔\mathrm{DataSeries}\left(\left[4\,5\,6\right]\,'\mathrm{labels}'=\left['c'\,'d'\,'e'\right]\right)$

$\mathrm{ds3}≔\left[\begin{array}{cc}c& 4\\ d& 5\\ e& 6\end{array}\right]$

$\mathrm{Append}\left(\mathrm{ds1}\,\mathrm{ds3}\right)$

Error, (in DataSeries:-Append) duplicate row labels detected: c

The DataSeries/Append command was introduced in Maple 2016.

For more information on Maple 2016 changes, see Updates in Maple 2016.