What will be the more appropriate method to add a cumulative sum column to a data frame. For example, assuming that I have the next data frame:
flag | price ---------------------- 1 |47.808764653746 1 |47.808764653746 1 |31.9869279512204 How can I create a data frame with an extra cumsum column as the next one: flag | price | cumsum_price ----------------------|------- 1 |47.808764653746 | 47.808764653746 1 |47.808764653746 | 95.6175293075 1 |31.9869279512204| 127.604457259 Thanks -- Cesar Flores
