Select columns from a collelction
column index collection
col index collection
Returns new collection composed of one or more selected columns from the input collection, columns are
specified with the index argument as a single integer index or collection of integers. Type of the returned
collection is the same as the type of the input collection.
Example:
"a := {{1 2 3 4} {5 6 7 8}}
print col {1 3} :a
"l := [{1 2 3 4} {5 6 7 8}]
print col 2 :l
Output:
{{1 3} {5 7}}
[2 6]
See also:
Table of Content