Threaded map function#
- sage.misc.map_threaded.map_threaded(function, sequence)#
Apply the function to the elements in the sequence by threading recursively through all sub-sequences in the sequence.
EXAMPLES:
sage: map_threaded(log, [[1,2], [3,e]]) [[0, log(2)], [log(3), 1]] sage: map_threaded(log, [(1,2), (3,e)]) [[0, log(2)], [log(3), 1]] sage: map_threaded(N, [[1,2], [3,e]]) [[1.00000000000000, 2.00000000000000], [3.00000000000000, 2.71828182845905]] sage: map_threaded((x^2).function(x), [[1,2,3,5], [2,10]]) [[1, 4, 9, 25], [4, 100]]
map_threaded also works on any object with an apply_map method, e.g., on matrices:
sage: map_threaded(lambda x: x^2, matrix([[1,2], [3,4]])) [ 1 4] [ 9 16]
AUTHORS:
William Stein (2007-12); based on feedback from Peter Doyle.