arraytools

The log file is saved under the working directory.

What this does correctly

log_file and log_message() set up your logging function — nothing special here, just a helper that appends timestamped lines to a file.
options(shiny.error = ...) registers a global hook. Whenever an error occurs anywhere in your app's reactive code and nothing catches it, Shiny calls this function before showing its default error UI to the user.
geterrmessage() retrieves the text of whatever error condition was just raised — that's what gets written to the log.

Caveats to be aware of

	<?xml version='1.0' encoding='UTF-8' standalone='yes'?>
	<sbgn xmlns="http://sbgn.org/libsbgn/0.3">
	<map id="causative.nwt" language="sif">
	<extension>
	<renderInformation
	xmlns="http://www.sbml.org/sbml/level3/version1/render/version1" id="renderInformation" program-name="sbgnviz" program-version="6.0.1" background-color="#00000000">
	<listOfColorDefinitions>
	<colorDefinition id="color_1" value="#ffffffff"/>
	<colorDefinition id="color_2" value="#323232"/>
	<colorDefinition id="color_3" value="#ff8164"/>

	$ tree
	├── app
	│ └── myapp
	│ └── app.R
	└── compose.yml
	$ mkdir -p app/myapp
	$ sudo chmod 777 app/myapp # shiny user can write
	$ docker compose up

	# Click the 'Write Output File' button

	# 1. Generate sample data
	set.seed(123)
	sample_data <- rnorm(100, mean = 0, sd = 1) # A sample from a standard normal distribution

	# 2. Define the theoretical CDF (for standard normal distribution)
	# In R, pnorm() is the CDF for the normal distribution
	theoretical_cdf <- function(x) pnorm(x, mean = 0, sd = 1)

	# 3. Compute the ECDF of your sample
	ecdf_sample <- ecdf(sample_data)

	# This method assumes that the files 'casaos.png' and 'shiny-test.txt' exist in the 'www' subdirectory.
	# They don't have to be in the 'www' subdirectory. If they're located elsewhere, modify the file paths accordingly.

	library(shiny)

	# UI
	ui <- fluidPage(
	titlePanel("Image Download Example"),

	mainPanel(

	import sys
	import time
	import pygame

	# Initialize pygame
	pygame.init()

	# Set up display (resizable)
	WIDTH, HEIGHT = 400, 200
	window = pygame.display.set_mode((WIDTH, HEIGHT), pygame.RESIZABLE)

	<!DOCTYPE html>
	<html>
	<head>
	<title>YouTube Video Embedder (1080p Size)</title>
	<style>
	body {
	font-family: Arial, sans-serif;
	text-align: center;
	padding: 20px;
	}

	---
	title: "Confounding/Suppression in Cox Regression: The Role of Age in the Sex–Survival Association"
	author: "Your Name"
	date: "`r Sys.Date()`"
	output:
	html_document:
	toc: true
	toc_float: true
	number_sections: true
	theme: flatly

	#EXTM3U
	#EXTINF:-1,WBJC Classical
	https://ice64.securenetsystems.net/WBJC
	#EXTINF:-1,NBC News
	https://d1si3n1st4nkgb.cloudfront.net/10502/88896001/hls/master.m3u8?ads.xumo_channelId=88896001
	#EXTINF:-1,Bloomberg Radio
	https://playerservices.streamtheworld.com/api/livestream-redirect/WBBRDCAAC.aac
	#EXTINF:-1,WAMU
	https://wamu.cdnstream1.com/wamu.mp3
	#EXTINF:-1,WETA Classical