Skip to main content

Merge on range between two columns

I have a table of records with a position "stand" and a column timestamp or "datetime". I need to append this table with information on "acreg" and "flight".

The table with records (df_hvd) has the following columns of interest:

datetime stand reason
022-08-08 02:55:15 D02 Technical

I have a table with all flights (arriving and departing movements), and the corresponding start and end time of each movement. Based on the movement and stand, I want to retrieve the correct "acreg" and "flight". This source data looks like (df_events):

acreg flight movement_type start_datetime end_datetime position
PHTFM OR1072 AR-PK 2022-08-08 02:24:44 2022-08-08 04:07:00 D02
PHTFM OR377 PK-DP 2022-08-08 12:15:00 2022-08-08 14:42:22 D07

Note that the timestamp of the first table falls between the start and end times in the second table. I somehow need to find a way to performa a merge that understands that the record of interest corresponds to the first movement in the source data.

I tried to built a loop, but it is far too slow and it has some key errors:

for r in df_hvd.index: 
    for e in df_temp.index: 
        if df_hvd.at[r, "Positie"] == df_temp.at[r, "stand"]:
            if df_hvd.at[r, "datetime"] <= df_temp.at[e, "end_datetime"] and df_hvd.at[r, "datetime"] >= df_temp.at[e, "start_datetime"]: 
                print(df_temp.at[r, "acreg"])

This also didn't work:

for e in df_temp.index: 
    stand = df_temp.at[e, "stand"]
    start = df_temp.at[e, "start_datetime"]
    end = df_temp.at[e, "end_datetime"]
    acreg = df_temp.at[e, "acreg"]
    
    df_hvd.loc[(df_hvd["datetime"] <= end) & (df_hvd["datetime"] >= start) & (df_hvd["Positie"] == stand), 'acreg'] = acreg


source https://stackoverflow.com/questions/75733938/merge-on-range-between-two-columns
Labels:

Comments

Post a Comment

Popular posts from this blog

Confusion between commands.Bot and discord.Client | Which one should I use?

Whenever you look at YouTube tutorials or code from this website there is a real variation. Some developers use client = discord.Client(intents=intents) while the others use bot = commands.Bot(command_prefix="something", intents=intents) . Now I know slightly about the difference but I get errors from different places from my code when I use either of them and its confusing. Especially since there has a few changes over the years in discord.py it is hard to find the real difference. I tried sticking to discord.Client then I found that there are more features in commands.Bot . Then I found errors when using commands.Bot . An example of this is: When I try to use commands.Bot client = commands.Bot(command_prefix=">",intents=intents) async def load(): for filename in os.listdir("./Cogs"): if filename.endswith(".py"): client.load_extension(f"Cogs.{filename[:-3]}") The above doesnt giveany response from my Cogs ...
Post a Comment
Read more

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