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1. #Array mathematica mod#
2. #Array mathematica full#

Count pattern represents an operator form of Count that can be applied to an expression. Count expr, pattern, levelspec gives the total number of subexpressions matching pattern that appear at the levels in expr specified by levelspec. Lempel’s algorithm generalizes to finite fields of any order, not just integers modulo a prime. Arrays in the Wolfram Language are just lists in which each element is itself a list. gives the number of elements in list that match pattern.

#Array mathematica full#

ArrayQexpr, patt requires expr to be a full array with. We can implement this in Mathematica by fill := If = 1, 1, 0] ArrayQexpr gives True if expr is a full array or a SparseArray object, and gives False otherwise.

Then you can create a Costas array of size n = p-2 by filling in the ( i, j) square if and only if The Wolfram Language routinely handles huge arrays of numeric, symbolic, textual, or any other data, with any dimension or structure.

#Array mathematica mod#

Lempel’s algorithm says to start with parameters p and a where p is a prime and a is a primitive root mod p. I picked four functions of i as an example. Map f represents an operator form of Map that can be applied to an expression. Map f, expr, levelspec applies f to parts of expr specified by levelspec. The earlier post implemented the Lempel algorithm in Python. 4 Answers Sorted by: 16 Typically the best way to accumulate results from an arbitrary process is to use Sow and Reap. applies f to each element on the first level in expr. In a nutshell, a Costas array of size n is a solution to the n rooks problem, with the added constraint that if you added wires between the rooks, no two wires would have the same length and slope. Whenever I add an array spiral and make it follow the curve, it doesnt seem to look quite right.  can be entered as tr or \.A couple days ago I wrote about Costas arrays.

Drop list, seq1, seq2, gives a nested list in which elements specified by seq i have been. gives list with elements m through n in steps of s dropped. gives list with elements m through n dropped. gives list with its last n elements dropped.