XSPEC> data a ! The file a.pha is read in as the first (and only) data set.XSPEC> data,,b ! b.pha becomes the second data set, the first data set is unmodified (e.g. it is still a.pha).
XSPEC> data c 3 d,e,f ! c.pha replaces a.pha as the first data set; d.pha, e.pha, and f.pha provide the, third, fourth, and fifth data sets.
XSPEC> data g/ ! g.pha replaces c.pha as the first data set; the slash (/) indicates that the 2nd through the 5th data sets remain as before.
XSPEC> data 2 none/ ! The string none indicates that the 2nd data set (b.pha) is to be totally removed. The current total number of data sets thus becomes one less (4). The current data sets are g.pha, d.pha, e.pha, and f.pha.
XSPEC> data h,, ! The current total number of data sets becomes 2, the current data sets are from h.pha and d.pha.
XSPEC> data ! There is no change in the data status.
XSPEC> data 1 ! The number of data sets is set explicitly to one, that being from h.pha.
XSPEC> data 1:1 a 2:2 b 3:3 c ! Read a.PHA into data group 1, b.pha into data group 2, and c.pha into data group 3.
XSPEC> data 1:1 a 1:2 b 2:3 c ! Read a.pha and b.pha into data group 1, and c.pha into data group 2.
XSPEC> data a{3} ! Read the third spectrum in the file a.pha.