Counter and Theme Toggle - R Typing CST Test
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Counter and Theme Toggle — R Code
Demonstrates a simple counter with theme toggling using R variables and console output.
count <- 0
isDark <- FALSE
updateUI <- function() {
cat(paste0('Counter: ', count, '\n'))
cat(paste0('Theme: ', ifelse(isDark, 'Dark', 'Light'), '\n'))
}
increment <- function() { count <<- count + 1; updateUI() }
decrement <- function() { count <<- count - 1; updateUI() }
reset <- function() { count <<- 0; updateUI() }
toggleTheme <- function() { isDark <<- !isDark; updateUI() }
# Simulate some actions
updateUI()
increment()
increment()
toggleTheme()
decrement()
reset()R Language Guide
R is a high-level, interpreted programming language and environment specifically designed for statistical computing, data analysis, and graphical representation. It provides a rich ecosystem of packages and functions for statistical modeling, data visualization, and reproducible research.
Primary Use Cases
- ▸Statistical modeling and hypothesis testing
- ▸Data visualization and reporting
- ▸Machine learning and predictive analytics
- ▸Bioinformatics and genomic data analysis
- ▸Financial and econometric analysis
Notable Features
- ▸Extensive statistical functions and packages
- ▸High-quality graphics with ggplot2 and base plotting
- ▸Vectorized operations for efficient computation
- ▸Data frame and tibble structures for data manipulation
- ▸CRAN repository with thousands of contributed packages
Origin & Creator
Created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, in 1993 as an open-source alternative to S and S-PLUS.
Industrial Note
R is heavily used in statistical research, data science, machine learning experiments, and academic publications where reproducible data analysis is critical.