BUILT-IN MATHEMATICA SYMBOL
Thread
Thread[f[args]]
"threads" f over any lists that appear in args.
Thread[f[args], h]
threads f over any objects with head h that appear in args.
Thread[f[args], h, n]
threads f over objects with head h that appear in the first n args.
- Functions with attribute Listable are automatically threaded over lists.
- All the elements in the specified args whose heads are h must be of the same length.
- Arguments that do not have head h are copied as many times as there are elements in the arguments that do have head h. »
- Thread specifies arguments using the standard sequence specification:
-
| All | all elements |
| None | no elements |
| n | elements 1 through n |
| -n | last n elements |
| {n} | element n only |
| {m,n} | elements m through n inclusive |
| {m,n,s} | elements m through n in steps of s |
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