Skip to main content

apply a function to each level of grouping factor and create new column in existing data frame

I have a data frame (df) that looks like this

           timestamp                  datetime        date      time    open  \
0      1667520000000 2022-11-04 00:00:00+00:00  2022-11-04  00:00:00  0.2186   
1      1667606400000 2022-11-05 00:00:00+00:00  2022-11-05  00:00:00  0.2589   
2      1667692800000 2022-11-06 00:00:00+00:00  2022-11-06  00:00:00  0.2459   
3      1667779200000 2022-11-07 00:00:00+00:00  2022-11-07  00:00:00  0.2315   
4      1667865600000 2022-11-08 00:00:00+00:00  2022-11-08  00:00:00  0.2353   
              ...                       ...         ...       ...     ...   
15012  1675728000000 2023-02-07 00:00:00+00:00  2023-02-07  00:00:00  0.2449   
15013  1675814400000 2023-02-08 00:00:00+00:00  2023-02-08  00:00:00  0.2610   
15014  1675900800000 2023-02-09 00:00:00+00:00  2023-02-09  00:00:00  0.2555   
15015  1675987200000 2023-02-10 00:00:00+00:00  2023-02-10  00:00:00  0.2288   
15016  1676073600000 2023-02-11 00:00:00+00:00  2023-02-11  00:00:00  0.2317   
         high     low   close        volume              symbol  
0      0.2695  0.2165  0.2588  1.239168e+09  1000LUNC/USDT:USDT  
1      0.2788  0.2414  0.2458  1.147000e+09  1000LUNC/USDT:USDT  
2      0.2554  0.2292  0.2315  5.137089e+08  1000LUNC/USDT:USDT  
3      0.2398  0.2263  0.2352  4.754763e+08  1000LUNC/USDT:USDT  
4      0.2404  0.1320  0.1895  1.618936e+09  1000LUNC/USDT:USDT  
       ...     ...     ...           ...                 ...  
15012  0.2627  0.2433  0.2611  8.097549e+07       ZRX/USDT:USDT  
15013  0.2618  0.2432  0.2554  7.009100e+07       ZRX/USDT:USDT  
15014  0.2651  0.2209  0.2287  1.217487e+08       ZRX/USDT:USDT  
15015  0.2361  0.2279  0.2317  6.072029e+07       ZRX/USDT:USDT  
15016  0.2418  0.2300  0.2409  2.178281e+07       ZRX/USDT:USDT

I want to apply a function from pandas ta, called bbands to each level of symbol using the column 'close' as the input. The function return multiple variables, but I only want to keep the one labeled 'BBM_20_2.0' and store this as another column in the df.

If I were to just apply the function to entire df ignoring the fact that each symbols has to be treated separately I would do this

daily_df['bbm'] = bbands(daily_df.close, 20, 2)['BBM_20_2.0']

I have tied to use groupby like this

daily_df['bbm'] = daily_df.groupby(["symbol"]).apply(bbands(daily_df.close, 20, 2)['BBM_20_2.0'])

but Im getting errors. Can anyone help?



source https://stackoverflow.com/questions/75421579/apply-a-function-to-each-level-of-grouping-factor-and-create-new-column-in-exist
Labels:

Comments

Post a Comment

Popular posts from this blog

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console
Post a Comment
Read more

How to split a rinex file if I need 24 hours data

Trying to divide rinex file using the command gfzrnx but getting this error. While doing that getting this error msg 'gfzrnx' is not recognized as an internal or external command Trying to split rinex file using the command gfzrnx. also install'gfzrnx'. my doubt is I need to run this program in 'gfzrnx' or in 'cmdprompt'. I am expecting a rinex file with 24 hrs or 1 day data.I Have 48 hrs data in RINEX format. Please help me to solve this issue. source https://stackoverflow.com/questions/75385367/how-to-split-a-rinex-file-if-i-need-24-hours-data
Post a Comment
Read more