Add_new_columns.jl

cumul_distance = Float64[]
day_type, day, month = (String[] for i = 1:3)	 
year = Int64[]	    

for i = 1:size(df_pedometer)[1]
    push!(cumul_distance, sum(df_pedometer[!, :distance][1:i]))
    push!(day, Dates.dayname(df_pedometer[!, :create_time][i]))
    push!(month, Dates.monthname(df_pedometer[!, :create_time][i]))
    push!(year, Dates.year(df_pedometer[!, :create_time][i]))
          
    if Dates.dayname(df_pedometer[!, :create_time][i]) in ["Saturday", "Sunday"]
        push!(day_type, "weekend")
    else
        push!(day_type, "weekday")
    end			
end

insertcols!(df_pedometer, 1, :cumul_distance => cumul_distance, :day_type => day_type, 
                             :day => day, :month => month, :year => year)