6.1 Processing Filters

This section lists the filter commands which can be used for table pipeline processing, in conjunction with cmd- or script-type parameters.

You can string as many of these together as you like. On the command line, you can repeat the cmd (or icmd1, or ocmd...) parameter multiple times, or use one cmd parameter and separate different filter specifiers with semicolons (";"). The effect is the same.

It's important to note that each command in the sequence of processing steps acts on the table at that point in the sequence. Thus either of the two identical invocations:

   stilts tpipe cmd='delcols 1; delcols 1; delcols 1'
   stilts tpipe cmd='delcols 1' cmd='delcols 1' cmd='delcols 1'

   stilts tpipe cmd='delcols "1 2 3"'

The available filters are described in the following subsections.

• 6.1.1 addcol
• 6.1.2 addpixsample
• 6.1.3 addresolve
• 6.1.4 addskycoords
• 6.1.5 assert
• 6.1.6 badval
• 6.1.7 cache
• 6.1.8 check
• 6.1.9 clearparams
• 6.1.10 collapsecols
• 6.1.11 colmeta
• 6.1.12 constcol
• 6.1.13 delcols
• 6.1.14 every
• 6.1.15 explodeall
• 6.1.16 explodecols
• 6.1.17 fixcolnames
• 6.1.18 group
• 6.1.19 head
• 6.1.20 healpixmeta
• 6.1.21 keepcols
• 6.1.22 meta
• 6.1.23 progress
• 6.1.24 random
• 6.1.25 randomview
• 6.1.26 repeat
• 6.1.27 replacecol
• 6.1.28 replaceval
• 6.1.29 rowrange
• 6.1.30 select
• 6.1.31 seqview
• 6.1.32 setparam
• 6.1.33 sort
• 6.1.34 sorthead
• 6.1.35 stats
• 6.1.36 tablename
• 6.1.37 tail
• 6.1.38 transpose
• 6.1.39 uniq