The with command, applied to a DataSeries object, makes values of the DataSeries available as variables at the interactive level.

The unwith command undoes the effects of prior calls to with.

The with command is effective only at the top level, and intended primarily for interactive use.  Because with operates by using lexical scoping, it does not work inside the bodies of procedures, module definitions, or within statements.  See the Examples section.

DataSeries are collections of labeled values of data. They are explained in more detail on the DataSeries help page.

Only value labels that are symbols can be used as variables. Values with labels that are not symbols (for example, indexed names or other algebraic expressions) are ignored by with.

When with is called with a DataSeries as its argument, it binds the value names of the DataSeries to the global namespace.  This makes the value names available to the interactive user at the top level of the Maple interaction loop.

The unwith command undoes the effects of prior calls to with. That is, when it is called with as its argument a DataSeries that was previously submitted to with, unwith unbinds the value names in the global namespace, any previous bindings of those names are restored.

The restart command clears the Maple internal memory, clearing any bindings made by with.

The with command is also used for making the exports of a package accessible in the global name space. This usage is explained on the with help page. This is different from using the command on a DataSeries object in several ways: the exports of a package are (typically) procedures, whereas the values in a DataSeries (typically) are not, for example.

$\mathrm{ds}≔\mathrm{DataSeries}\left(⟨1\,2\,3\,4⟩\,\mathrm{labels}=\left[a\,b\,c\,d\right]\right)$

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

$\mathrm{ds2}≔\mathrm{DataSeries}\left(⟨5\,6\,7\,8⟩\,\mathrm{labels}=\left[a\,c\,e\,g\right]\right)$

$\mathrm{ds2}≔\left[\begin{array}{cc}a& 5\\ c& 6\\ e& 7\\ g& 8\end{array}\right]$

$\mathrm{ds}\left[a\right]$

$1$

$a$

$a$

$\mathrm{with}\left(\mathrm{ds}\right)$

$\left[a\,b\,c\,d\right]$

$a$

$1$

$\mathrm{unwith}\left(\mathrm{ds}\right)$

$a$

$a$

$a≔12.3$

$a≔12.3$

$\mathrm{with}\left(\mathrm{ds}\right)$

$\left[a\,b\,c\,d\right]$

$a$

$1$

$:-a$

$12.3$

$\mathrm{with}\left(\mathrm{ds2}\right)$

$\left[a\,c\,e\,g\right]$

$a$

$5$

$\mathrm{ds}\left[a\right]$

Error, (in DataSeries:-`?[]`) invalid row index (5) into DataSeries with 4 rows

$\mathrm{ds}\left[:-a\right]$

Error, (in DataSeries:-`?[]`) invalid index 12.3 into DataSeries

$\mathrm{ds}\left[':-a'\right]$

$1$

The DataSeries/with and DataSeries/unwith commands were introduced in Maple 2016.

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