variations(List)

Synopsis

• Function: variations
• Usage:
variations(l)
• Inputs:
• Outputs:
• an integer, the number of sign changes in a sequence l

Description

This computes the number of changes of sign in a sequence l

 i1 : L = for i to 10 list random(-50,50) o1 = {-26, 15, 21, 22, -31, -31, 41, 22, 43, 29, 22} o1 : List i2 : variations(L) o2 = 3