数组平均路径

Question

我想在我的控制器中显示我的数组'temp'（作为平均数组）的平均值，但不确定如何处理它。我可以在控制器中使用范围方法调用吗？或者我可以直接在控制器中进行操作吗？

控制器

def show
    @soiltemp = Soiltemp.find(params[:id])
    @data = CSV.open(@soiltemp.csv.path, :headers => true, :encoding => 'ISO-8859-1')
    dates = []
    temp = []
    @data.each do |row|  
     dates << row[1]
     temp << row[2].to_i
    end
    average = ?
    @graph = LazyHighCharts::HighChart.new('graph') do |f|
      f.title({ :text => @soiltemp.site + " Soil Temperatures" })
      f.options[:xAxis][:categories] =  dates
      f.options[:plotOptions] = {pointInterval: 7.day * 7000}
      f.series(:type => 'area', :name => 'Temperature', :data => temp, :color => '#00463f') 
      f.series(:type => 'spline',:name => 'Average', :data => average) 
    end

Answer 1

 average = temp.sum / temp.size.to_f