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Pick

Pick[list, sel]
picks out those elements of list for which the corresponding element of sel is True.

Pick[list, sel, patt]
picks out those elements of list for which the corresponding element of sel matches patt.

MORE INFORMATION

sel can be a nested list of any depth.

Pick[list, sel, patt] picks out those list[[i₁, i₂, ...]] for which sel[[i₁, i₂, ...]] matches patt.

Depending on the arrangement of elements matching patt in a nested list sel, Pick may return a ragged array.

The heads in list and sel do not have to be List.

Pick works with SparseArray objects.

Basic Examples (2)

Pick out elements wherever a 1 appears in the "selector" list:

Pick out elements from a 2D array:

Generalizations & Extensions (1)

Possible Issues (1)

Cases Part Position Boole ListConvolve Select

Constructing Lists

Conditionals

Elements of Lists

New in 5.1

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