My data Send_Data Error All_Request 2018-01-02 0 10 2018-01-03 1 60 2018-01-04 2 30 2018-01-05 0 20 .... ... ... 2021-02-01 5 20 I want to make  chart from those data. The x-axis is the number of weeks passed.The y-axis is the error rate during this week This is the effect i want The data used in the first week is 2018-01-03->2018-01-09.The y-axis is made using all Error/All_Request in this time period. The data used in the second week is 2018-01-10->2018-01-16 and so on. I have used many methods, but they can’t be achieved.     ... View more