Class: Eventsims::Generate

Inherits:
Object
  • Object
show all
Defined in:
lib/eventsims/randgen.rb

Overview

Generating random outcomes and probabilities

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Generate

Returns a new instance of Generate.



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# File 'lib/eventsims/randgen.rb', line 7

def initialize(*args)
	''' Initialisation of all values'''
	# Starting variables that change result depending on the if statements
	start, stop, jump = 0, 10, 1
	@@outcome, @@occur, @@unique, @@problist, @@cumprob = [], [], [], [], []
	amount = (2..20).step(jump).to_a.sample
	amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
	
# If statements to run different functions
	if args.size == 0
		@@outcome = @@outcome

	elsif args.size == 1
		if args[0].is_a?(Integer) 
			amount, @@outcome = args[0], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			
		elsif args[0] == "r"
			@@outcome.sort!{|x,y| y<=>x}

		elsif args[0] == "s"
			@@outcome.sort!

		else
			raise "\nInvalid argument: Use (amount, 'r' or 's')"
		end

	elsif args.size == 2
		if args.all?{|x| x.is_a?(Integer)}
			start, stop, @@outcome = args[0], args[1], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample} 
			
		elsif args[1] == "r"
			amount, @@outcome = args[0], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!{|x,y| y<=>x}
			
		elsif args[1] == "s"
			amount, @@outcome = args[0], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!

		else
			raise "\nInvalid argument: Use (start, stop) or (amount, 'r' or 's')'"
		end

	elsif args.size == 3
		if args.all?{|x| x.is_a?(Integer)}
			start, stop, amount, @@outcome = args[0], args[1], args[2], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample} 
			
		elsif args[2] == "r"
			start, stop, @@outcome = args[0], args[1], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample} 
			@@outcome.sort!{|x,y| y<=>x}

		elsif args[2] == "s"
			start, stop, @@outcome = args[0], args[1], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample} 
			@@outcome.sort!

		else
			raise "\nInvalid argument: Use (start, stop, amount) or (amount, 'r' or 's')'"
		end

	elsif args.size == 4
		if args.all?{|x| x.is_a?(Integer)}
			start, stop, jump, amount, @@outcome = args[0], args[1], args[2], args[3], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			
		elsif args[3] == "r"
			start, stop, amount, @@outcome = args[0], args[1], args[2], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!{|x,y| y<=>x}

		elsif args[3] == "s"
			start, stop, amount, @@outcome = args[0], args[1], args[2], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!

		else
			raise "\nInvalid argument: Use (start, stop, step, amount) or \n\t(start, stop, amount, 'r' or 's')'"
		end

	elsif args.size == 5	
		if args[4] == "r"
			start, stop, jump, amount, @@outcome = args[0], args[1], args[2], args[3], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!{|x,y| y<=>x}

		elsif args[4] == "s"
			start, stop, jump, amount, @@outcome = args[0], args[1], args[2], args[3], []
			amount.times{@@outcome << (start..stop).step(jump).to_a.sample}
			@@outcome.sort!

		else
			raise "\nInvalid argument: Use (start, stop, step, amount, 'r' or 's')'"
		end
	end

	#Generates a set and times of occurrence ofoutcome
	@@outcome.each{|item| @@unique << item  unless @@unique.include?(item)}
	result = @@outcome.each_with_object(Hash.new(0)) { |word, counts| counts[word] += 1 }
	result.each{|x,y| @@occur << y}
	
end

Instance Method Details

#getcum ⇒ Object

Returns a cummulative probability list of all items in its argument



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# File 'lib/eventsims/randgen.rb', line 124

def getcum()
	'''Returns a cummulative probability list of all items in its argument'''
	increase, probability, cumlist = 0, getprob(), []
	probability.each{|i| increase +=i
		cumlist << increase.round(4) }
	cumlist[-1] = 1.0      #makes sure the last value is 1.0
	return cumlist
end

#getprob ⇒ Object

Returns a probability list of all items in its argument



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# File 'lib/eventsims/randgen.rb', line 115

def getprob()
	probability = []
	'''Returns a probability list of all items in its argument'''
	@@occur.each{|i| probability << (i*1.0/@@outcome.size).round(4)}

	return probability
end

#occur ⇒ Object

# Returns the number of times the unique item is found



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# File 'lib/eventsims/randgen.rb', line 146

def occur
	'''Returns the number of times the unique item is found'''
	return @@occur
end

#outcome ⇒ Object

Returns the outcome



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# File 'lib/eventsims/randgen.rb', line 134

def outcome()
	''' Returns a generated outcome '''
	return @@outcome
end

#unique ⇒ Object

Returns the unique outcome



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# File 'lib/eventsims/randgen.rb', line 140

def unique()
	'''Returns the unique outcome'''
	return @@unique
end