Mahon

A group of researchers including Annie Mahon investigated the weight loss of middle-aged women when they followed a reduced-calorie diet for 9 weeks. The weights of the women were measured in kilograms at the beginning of the study and again at the end.
MATH221
health
nutrition
Author

MATH 221

Published

April 30, 2024

Data details

There are 27 rows and 3 columns. The data source1 is used to create our data that is stored in our pins table. You can access this pin from a connection to posit.byui.edu using hathawayj/mahon.

This data is available to all.

Variable description

  • Subject: A unique key that identifies each subject
  • Pre: Weight before diet measured (kg)
  • Post: Weight after diet measured (kg)

Variable summary

Variable type: numeric

skim_variable n_missing complete_rate mean sd p0 p25 p50 p75 p100 hist
Subject 0 1 14.0 7.94 1.0 7.50 14.0 20.5 27.0 ▇▇▇▇▇
Pre 0 1 76.9 10.21 60.7 72.75 77.0 80.7 99.6 ▅▅▇▂▂
Post 0 1 70.1 10.63 53.3 63.45 69.9 75.2 97.0 ▅▇▆▂▂ 
NULL
Explore generating code using R 
library(tidyverse)
library(pins)
library(connectapi)

mahon <- read_csv('https://github.com/byuistats/data/raw/master/Mahon/Mahon.csv')


# Publish the data to the server with Bro. Hathaway as the owner.
board <- board_connect()
pin_write(board, mahon, type = "parquet", access_type = "all")

pin_name <- "mahon"
meta <- pin_meta(board, paste0("hathawayj/", pin_name))
client <- connect()
my_app <- content_item(client, meta$local$content_id)
set_vanity_url(my_app, paste0("data/", pin_name))

Access data

This data is available to all.

Direct Download: mahon.parquet

R and Python Download:

URL Connections:

For public data, any user can connect and read the data using pins::board_connect_url() in R.

library(pins)
url_data <- "https://posit.byui.edu/data/mahon/"
board_url <- board_connect_url(c("dat" = url_data))
dat <- pin_read(board_url, "dat")

Use this custom function in Python to have the data in a Pandas DataFrame.

import pandas as pd
import requests
from io import BytesIO

def read_url_pin(name):
  url = "https://posit.byui.edu/data/" + name + "/" + name + ".parquet"
  response = requests.get(url)
  if response.status_code == 200:
    parquet_content = BytesIO(response.content)
    pandas_dataframe = pd.read_parquet(parquet_content)
    return pandas_dataframe
  else:
    print(f"Failed to retrieve data. Status code: {response.status_code}")
    return None

# Example usage:
pandas_df = read_url_pin("mahon")

Authenticated Connection:

Our connect server is https://posit.byui.edu which you assign to your CONNECT_SERVER environment variable. You must create an API key and store it in your environment under CONNECT_API_KEY.

Read more about environment variables and the pins package to understand how these environment variables are stored and accessed in R and Python with pins.

library(pins)
board <- board_connect(auth = "auto")
dat <- pin_read(board, "hathawayj/mahon")
import os
from pins import board_rsconnect
from dotenv import load_dotenv
load_dotenv()
API_KEY = os.getenv('CONNECT_API_KEY')
SERVER = os.getenv('CONNECT_SERVER')

board = board_rsconnect(server_url=SERVER, api_key=API_KEY)
dat = board.pin_read("hathawayj/mahon")