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A knife-edge selectivity function where weights greater or equal to knife_edge_size are selected.
knife_edge_size
knife_edge(w, knife_edge_size, ...)
Vector of selectivities at the given sizes.
Vector of sizes.
The weight at which the knife-edge operates.
Unused
Other selectivity functions: double_sigmoid_length(), sigmoid_length(), sigmoid_weight()
double_sigmoid_length()
sigmoid_length()
sigmoid_weight()