Basic stock reader from yahoo

stockReader.rb

require 'daru'
require 'open-uri'
require 'csv'

@yahoo_base_url = "http://ichart.finance.yahoo.com/table.csv?"
def from_yahoo(sym, options)
	params = {}
	params[:s] = sym
	if options[:from]
		start_date = DateTime.parse(options[:from])
		params[:a] = start_date.month-1
		params[:b] = start_date.day
		params[:c] = start_date.year
	end
	if options[:to]
		end_date = DateTime.parse(options[:to])
		params[:d] = end_date.month-1
		params[:e] = end_date.day
		params[:f] = end_date.year
	end
	url = @yahoo_base_url+params.map{|key, val| "#{key}=#{val}"}.join('&')
	res = CSV.parse(open(url).read).transpose
	h = {}
	res.each{|x| h[x[0]] = x[1..-1]}
	puts h
	df = Daru::DataFrame.new(h)
end

df = from_yahoo('IBM', {:from => '2016-03-7', :to => '2016-03-10'})