Top "Cumsum" questions

Calculate cumulative sum (cumsum) by group

With data frame: df <- data.frame(id = rep(1:3, each = 5) , hour = rep(1:5, 3) , value = sample(1:15)) I want to add a …

r cumsum

Calculating cumulative returns with pandas dataframe

I have this dataframe Poloniex_DOGE_BTC Poloniex_XMR_BTC Daily_rets perc_ret 172 0.006085 -0.000839 0.003309 0 173 0.006229 0.002111 0.005135 0 174 0.000000 -0.001651 0.004203 0 175 0.000000 0.007743 0.005313 0 176 0.000000 -0.001013 -0.003466 0 177 0.000000 -0.000550 0.000772 0 178 0.000000 -0.009864 0.001764 0 …

python pandas cumsum

How can I use cumsum within a group in Pandas?

I have df = pd.DataFrame.from_dict({'id': ['A', 'B', 'A', 'C', 'D', 'B', 'C'], 'val': [1,2,-3,1,5,6,-2], 'stuff':['12…

python pandas group-by dataframe cumsum

Cumsum as a new column in an existing Pandas data

I have a pandas dataframe defined as: A B SUM_C 1 1 10 1 2 20 I would like to do a cumulative sum of …

python pandas dataframe cumsum

Perform a reverse cumulative sum on a numpy array

Can anyone recommend a way to do a reverse cumulative sum on a numpy array? Where 'reverse cumulative sum' is …

python arrays numpy cumsum

How to compute cumulative sum of previous N rows in pandas?

I am working with pandas, but I don't have so much experience. I have the following DataFrame: A 0 NaN 1 0.00 2 0.00 3 3.33 4 10.21 5 6.67 6 7.00 7 8.27 8 6.07 9 2.17 10 3.38 11 2.48 12 2.08 13 6.95 14 0.00 15 1.75 16 6.66 17 9.69 18 6.73 19 6.20 20 3.01 21 0.32 22 0.52 and …

python pandas cumsum

Cumulative sum in a matrix

I have a matrix like A= [ 1 2 4 2 3 1 3 1 2 ] and I would like to calculate its cumulative sum by row and by column, …

arrays performance r matrix cumsum

Conditional Cumulative Sum in R

I have a time series data frame and want to compute cumulative returns for stock symbols intra-day for a range …

r cumsum

How to groupby consecutive values in pandas DataFrame

I have a column in a DataFrame with values: [1, 1, -1, 1, -1, -1] How can I group them like this? [1,1] [-1] [1] […

python pandas dataframe group-by cumsum

R: cumulative sum over rolling date range

In R, how can I calculate cumsum for a defined time period prior to the row being calculate? Prefer dplyr …

r dplyr cumsum