The convert command can convert to a TimeSeries, DataFrame, an Array, a Matrix, or a listlist (a list of lists). If the data has only a single column, then it can also convert to a Vector (or a Vector[row] (a row vector)), or a list (a single, flat list).

The conversion to TimeSeries accepts any number of extra arguments which are passed to the TimeSeries constructor call. You can use this to, for example, override the column names, by passing an argument of the form headers = my_headers, or to set the period if you expect a particular periodicity by passing an argument of the form period = n.

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 datatype of the new data structure by passing a datatype = d option.

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

$\mathrm{ref}≔\mathrm{Quandl}:-\mathrm{Reference}\left(''FRED/CANPOPL''\right)$

$\mathrm{ref}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Population\; in\; Canada\; (DISCONTINUED)}\\ \mathrm{Quandl\; FRED/CANPOPL}\\ \mathrm{up\; to\; 52\; rows\; (annual),\; 1\; column}\\ \mathrm{1960-01-01\; -\; 2011-01-01}\end{array}\right]$

$\mathrm{convert}\left(\mathrm{ref}\,\'\mathrm{Matrix}\'\right)$

$\mathrm{convert}\left(\mathrm{ref}\,\'\mathrm{TimeSeries}\'\,\'\mathrm{period}\'\=3\right)$

$\left[\begin{array}{c}\mathrm{Time\; series}\\ \mathrm{VALUE}\\ \mathrm{52\; rows\; of\; data:}\\ \mathrm{1960-12-31\; -\; 2011-12-31}\end{array}\right]$

$\mathrm{ref2}≔\mathrm{DataSets}:-\mathrm{Reference}\left(''quandl''\,''PORDATA/01''\right)$

$\mathrm{ref2}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Portugal\; Population,\; Population\; Census,\; Resident\; population\; by\; sex}\\ \mathrm{Quandl\; PORDATA/01}\\ \mathrm{up\; to\; 52\; rows\; (annual),\; 3\; columns}\\ \mathrm{1960-12-31\; -\; 2011-12-31}\end{array}\right]$

$\mathrm{convert}\left(\mathrm{ref2}\,\mathrm{DataFrame}\right)$

$\left[\begin{array}{cccc}& ''Total''& ''Males''& ''Females''\\ ''1960-12-31''& 8.8893920\times {10}^6& 4.2544160\times {10}^6& 4.6349760\times {10}^6\\ ''1970-12-31''& 8.6632520\times {10}^6& 4.1093600\times {10}^6& 4.5538920\times {10}^6\\ ''1981-12-31''& 9.8330140\times {10}^6& 4.7377150\times {10}^6& 5.0952990\times {10}^6\\ ''1991-12-31''& 9.8671470\times {10}^6& 4.7567750\times {10}^6& 5.1103720\times {10}^6\\ ''2001-12-31''& 1.03561170\times {10}^7& 5.0001410\times {10}^6& 5.3559760\times {10}^6\\ ''2011-12-31''& 1.05621780\times {10}^7& 5.0466000\times {10}^6& 5.5155780\times {10}^6\end{array}\right]$

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

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