R-bloggers

Introduction A scree plot is a line plot that shows the eigenvalues or variance explained by each principal component (PC) in a Principal Component Analysis (PCA). It is a useful tool for determining the number of PCs to retain in a PCA model. I...

It’s not common for Shiny Developers and Data Scientists to have strong design and frontend/web development skills. They usually prefer working with data, quickly visualizing it, and try to avoid diving into the complexities of CSS.  Getting buy-in within an organization for technological projects is hard. Many decision-makers ...

Excel BI’s Excel Challenge #309 — solved in RDefining the Puzzle:The newest puzzle by ExcelBI is going from words to books. I need to construct script which convert ISBN10 into ISBN13 number. Those number are used to identify books internationall. How ...

Introduction Bubble charts are a great way to visualize data with three dimensions. The size of the bubbles represents a third variable, which can be used to show the importance of that variable or to identify relationships between the three var...

Zhenguo Zhang's Blog /2023/10/23/r-tidy-evaluation-in-ggplot2/ - Since ggplot2 version 3.0.0, it started to support tidy evaluation, and use the technique to replace aes_ and aes_string(). In this post, I would like to show how the syntax of ggplot2 ...

In the diverse universe of data analysis, one often finds themselves in the role of an intrepid treasure hunter. Picture the gold rush era, with miners sifting through endless sands and dirt, eyes alight with the thrill of discovery, and hands eager to unearth the gleaming rewards of their relentless ...

Excel BI’s Excel Challenge #308 — solved in RDefining the Puzzle:The newest puzzle by ExcelBI is still focused on world of words. We need to determine if words are Portmanteau, which means that they are complex structure taking parts of root words whic...

Introduction Recently, I have been reading “Mathematical Statistics” by Professor Keith Knight and I noticed a interesting passage he mentions when discussing finite sample spaces: *In some cases, it may be possible to enumerate all possible outcomes, but in general such enumeration is physically impossible; for example, enumerating all possible 5 ...

Excel BI’s Excel Challenge #307 — solved in RDefining the Puzzle:Today ExcelBI gave us another puzzle, this time based on string manipulation rather than numbers.List all Palindromic phrases.A Palindromic phrase is that which is same when read from bac...

I am currently working on weighted sampling for dqrng, c.f. #72, for which also have to decide on the algorithm(s) to use for weighted sampling without replacement. Before looking at that I wanted to verify my decisions for the unweighted case. Usin...

On a scientist’s Google Scholar page, there is a list of co-authors in the sidebar. I’ve often wondered how Google determines in what order these co-authors appear. The list of co-authors on a primary author’s page is not exhaustive. It only lists co-authors who also have a ...

I have a function called 'GetDescriptiveStatistics' that takes some data and returns summary statistics. The function is written in C++, and I want to call it and display the results in a Windows desktop application. This post describes how to do this.

In an era where data drives critical decisions, interactive dashboards and data applications have ascended as indispensable tools across sectors like business, scientific research, and more. This is especially true in fields like life sciences, where the need for accessible data analytics and visualization is critical for research and healthcare ...

Introduction A Pareto chart is a type of bar chart that shows the frequency of different categories in a dataset, ordered by frequency from highest to lowest. It is often used to identify the most common problems or causes of a problem, so that ...

Back in June I self-published a book on Amazon’s Kindle Direct Publishing service and wrote a blog post detailling how you could achieve that using Quarto, which you can read here. The book is about building reproducible analytical pipelines with R. For the purposes of this post I made ...

Following on from the success of Shiny in Production 2022, last week we were delighted to host the conference for the second time. The event took place at the Catalyst in Newcastle and featured tw...