The convert command can convert to an Array, Matrix, listlist, Vector, or list.

The conversions to Array, Matrix, and Vector accept any number of extra arguments which are passed to the appropriate data structure constructor. You can use this to, for example, set the order of the new data structure by passing a order = o option.

Data sets are typically large enough that converting the whole data set will require a substantial amount of time to download all the metadata. Converting smaller subsets will take less time.

$\mathrm{with}\left(\mathrm{DataSets}\right)\:$

$\mathrm{ref}≔\mathrm{Reference}\left(''Builtin''\,''Country''\right)$

$\mathrm{ref}≔\left[\begin{array}{ccccc}\mathrm{Country\; (Name)}& \mathrm{Currency\; Code}& \mathrm{2\; Letter\; Country\; Code}& \mathrm{\dots }& \mathrm{(57\; more)}\\ \mathrm{Afghanistan}& ''AFN''& ''AF''& \mathrm{\dots }& \\ \mathrm{Albania}& ''ALL''& ''AL''& \mathrm{\dots }& \\ \mathrm{Algeria}& ''DZD''& ''DZ''& \mathrm{\dots }& \\ \mathrm{⋮}& \mathrm{⋮}& \mathrm{⋮}& \mathrm{\ddots }& \\ \mathrm{(182\; more)}& & & & \end{array}\right]$

$\mathrm{convert}\left(\mathrm{ref}\left[1..3,1..3\right]\,'\mathrm{Matrix}'\right)$

$\left[\begin{array}{cccc}''Afghanistan''& ''AFN''& ''AF''& ''af''\\ ''Albania''& ''ALL''& ''AL''& ''al''\\ ''Algeria''& ''DZD''& ''DZ''& ''dz''\end{array}\right]$

$\mathrm{convert}\left(\mathrm{ref}\left[1..3,1..3\right]\,'\mathrm{listlist}'\right)$

$\left[\left[''Afghanistan''\,''AFN''\,''AF''\,''af''\right]\,\left[''Albania''\,''ALL''\,''AL''\,''al''\right]\,\left[''Algeria''\,''DZD''\,''DZ''\,''dz''\right]\right]$

$\mathrm{refg}≔\mathrm{Reference}\left(''Builtin''\,''GeoNames''\right)$

$\mathrm{refg}≔\left[\begin{array}{ccccc}\mathrm{Geonames\; (GeoNamesid)}& \mathrm{Name}& \mathrm{Type}& \mathrm{\dots }& \mathrm{(7\; more)}\\ \mathrm{68}& \mathrm{Boneh-ye\; Mehdi}& ''section\; of\; populated\; place''& \mathrm{\dots }& \\ \mathrm{121}& \mathrm{Lab\; Sefid}& ''locality''& \mathrm{\dots }& \\ \mathrm{166}& \mathrm{Gorizi}& ''locality''& \mathrm{\dots }& \\ \mathrm{⋮}& \mathrm{⋮}& \mathrm{⋮}& \mathrm{\ddots }& \\ \mathrm{(1155858\; more)}& & & & \end{array}\right]$

$\mathrm{convert}\left(\mathrm{refg}\left[\left[\mathrm{Name}=''Paris''\&comma;1000000<\mathrm{Population}\right]\right]\&comma;'\mathrm{Matrix}'\right)$

$\left[\begin{array}{cccccccccc}''2968815''& ''Paris''& ''second-order\; administrative\; division''& 48.8534000000000006& 2.34859999999999980& ''France''& ''Ile-de-France''& ''Paris''& 2257981& ''Europe/Paris''\\ ''2988506''& ''Paris''& ''third-order\; administrative\; division''& 48.8533899999999974& 2.34864000000000006& ''France''& ''Ile-de-France''& ''Paris''& 2257981& ''Europe/Paris''\\ ''2988507''& ''Paris''& ''capital\; of\; a\; political\; entity''& 48.8534099999999967& 2.34880000000000022& ''France''& ''Ile-de-France''& ''Paris''& 2138551& ''Europe/Paris''\end{array}\right]$

The DataSets[Builtin][Reference][convert] command was introduced in Maple 2015.

For more information on Maple 2015 changes, see Updates in Maple 2015.