Select a subset of the original columns to be included when data is retrieved.

The order of the columns may be changed but duplicate columns are not allowed.

Set the date range of the data to be retrieved. The date string must be such that it is accepted by StringTools[ParseTime] with the format "%Y-%m-%d". For example "2015-02-18".

Cannot exceed the original date range.

Set the data frequency of the data to be retrieved. Cannot be more frequent than the original frequency.

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

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

$\mathrm{ref}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Bitcoin\; Mining\; Statistics}\\ \mathrm{Quandl\; BITCOINWATCH/MINING}\\ \mathrm{up\; to\; 2813\; rows\; (daily),\; 13\; columns}\\ \mathrm{2013-08-26\; -\; 2021-05-08}\end{array}\right]$

$\mathrm{SetColumns}\left(\mathrm{ref}\,\left[2\,3\right]\right)$

$\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Bitcoin\; Mining\; Statistics}\\ \mathrm{Quandl\; BITCOINWATCH/MINING}\\ \mathrm{up\; to\; 2813\; rows\; (daily),\; 2\; columns}\\ \mathrm{2013-08-26\; -\; 2021-05-08}\end{array}\right]$

$\mathrm{SpainOliveOil}≔\mathrm{Quandl}:-\mathrm{Reference}\left(''UINC/VOLO\_ESP''\right)$

$\mathrm{SpainOliveOil}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Production\; of\; Virgin\; Olive\; Oil\; -\; Spain}\\ \mathrm{Quandl\; UINC/VOLO\_ESP}\\ \mathrm{up\; to\; 22\; rows\; (annual),\; 2\; columns}\\ \mathrm{1995-12-31\; -\; 2016-12-31}\end{array}\right]$

$\mathrm{SpainOliveOil}≔\mathrm{SetFromDate}\left(\mathrm{SpainOliveOil}\,''2000-12-31''\right)$

$\mathrm{SpainOliveOil}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Production\; of\; Virgin\; Olive\; Oil\; -\; Spain}\\ \mathrm{Quandl\; UINC/VOLO\_ESP}\\ \mathrm{up\; to\; 17\; rows\; (annual),\; 2\; columns}\\ \mathrm{2000-12-31\; -\; 2016-12-31}\end{array}\right]$

$\mathrm{SpainOliveOil}≔\mathrm{SetToDate}\left(\mathrm{SpainOliveOil}\,''2011-12-31''\right)$

$\mathrm{SpainOliveOil}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Production\; of\; Virgin\; Olive\; Oil\; -\; Spain}\\ \mathrm{Quandl\; UINC/VOLO\_ESP}\\ \mathrm{up\; to\; 12\; rows\; (annual),\; 2\; columns}\\ \mathrm{2000-12-31\; -\; 2011-12-31}\end{array}\right]$

$\mathrm{SpainOliveOil}≔\mathrm{SetColumns}\left(\mathrm{SpainOliveOil}\,\left[2\right]\right)$

$\mathrm{SpainOliveOil}≔\left[\begin{array}{c}\mathrm{Data\; set}\\ \mathrm{Production\; of\; Virgin\; Olive\; Oil\; -\; Spain}\\ \mathrm{Quandl\; UINC/VOLO\_ESP}\\ \mathrm{up\; to\; 12\; rows\; (annual),\; 1\; column}\\ \mathrm{2000-12-31\; -\; 2011-12-31}\end{array}\right]$

$\mathrm{TimeSeriesAnalysis}:-\mathrm{TimeSeriesPlot}\left(\mathrm{SpainOliveOil}\right)$

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

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