Displaying 1 result from an estimated 1 matches for "vol_ym1".
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vol_xml
2012 Jun 13
2
templated use of aggregate
...have subset by date.
now it contains a date-time-stamp, and two columns (price and volume
traded): my objective is to create tables of volume traded at a price - and
i've been successfully using aggregate to do so in interactive use.
say the data looks as follows:
px_ym1 vol_ym1
2012-06-01 09:37:00 97.91 437
2012-06-01 09:37:00 97.91 64
2012-06-01 09:37:00 97.91 1
2012-06-01 09:37:00 97.91 5
2012-06-01 09:37:00 97.91 5
2012-06-01 09:37:00 97.92 174
2012-06-01 09:37:00 97.92 64
2012-06-01 09:37:00 97.92 125
2012-06-01 09:37:00...