Ever wanted to have a clock on the wall or in the office, that is not binary. But it is QR-Code clock 🙂 Well, now you can have it. This useless R function generates new QR Code for every given…Read more ›

R functions for every data engineer using Tidyverse Tidyverse has long been an amazing collection of R packages, primarily for data engineering and data science. Common among these packages is the same language grammar, great design and structure, making data…Read more ›

ROC (Receiver Operation Characteristics) – curve is a graph that shows how classifiers performs by plotting the true positive and false positive rates. It is used to evaluate the performance of binary classification models by illustrating the trade-off between True…Read more ›

This sample R code is an implementation one of possible solutions for generating timetable schedule. The proposed solution is based on methods of evolutionary computing, and it uses (1+1) evolutionary strategy and simulated hardening. The success of solution is estimated…Read more ›

Let’s play with some dragons. Dragons from the Jurassic park or the board game dungeon and dragons. The algorithm is a fractal curve of Hausdorff dimension 2. One starts with one segment. In each iteration the number of segments is…Read more ›

A simple, yet effective way to set your colour palette in R using ggplot library. After that, we can start “chaining” ggplot graphs. Scatter plot Barchart / Histogram Boxplot 3.14 chart Finally custom colours! As always, the complete code is…Read more ›

Calculating cumulative percentage or percentage per group for each time can sometimes be a task with a slight twist. Let’s check this with ggplot2 and tidyverse. Three (out of many more) ways to show how this can be achieved. using…Read more ›

You know the feeling after long vacation and finally sitting in front of your favourite UI and even forgot how to write simplest “hello world” or “foo bar” function? Well, we got you covered! The reverse Hello world function is…Read more ›

In this Microsoft Fabric series: We have looked into creating the lakehouse, checked the delta lake and delta tables, got some data into the lakehouse, and created a custom environment and Spark job definition. And now we need to see,…Read more ›

n this Microsoft Fabric series: An Apache Spark job definition is a single computational action, that is normally scheduled and triggered. In Microsoft Fabric (same as in Synapse), you could submit batch/streaming jobs to Spark clusters. By uploading a binary…Read more ›

In this Microsoft Fabric series: Yesterday we looked into lakehouse and learned that Delta tables are the storing format. So, let’s explore what and how we can go around understanding and working with delta tables. But first we must understand…Read more ›

Uselessness is such a long useless word! In statistics, R-squared is a statistical measure, that determines the proportion of variance in dependent variable that can be explained by the independent variable. Therefore, it ranges in value from 0 to 1…Read more ›

Trick your brain into faster reading with the help of Bionic Reading. With the help of highlighting part of the words, it “guides your eyes over the text and the brain remembers previously learned words more quickly.” (source: br-about) Here…Read more ›

Coming from the simple sine function (remember of Fourier series), German mathematician Karl Weierstrass became the first to publish an example of a continuous, nowheredifferentiable function. Weierstrass function (originally defined as a Fourier series) was the first instance in which…Read more ›

Another one from the Leetcode challenge. This time, get the elements (single values) from the matrix in a spiral order with a starting position of [1,1]. So, the basic idea is to retrieve a vector of elements from a matrix…Read more ›

This is fun 🙂 It is also O(MAX) complexity. But first some background. Since the problem is super old, we are not intending to solve it, merely to play with it. In the number theory of mathematics, the Goldbach’s conjecture…Read more ›

The datasetR helps you generate a random datasets for your R project. It provides a preset random list of values with different data types (interval, ordinal, nominal values). It includes also a function for imputing a NULL, NA or missing values. Installing…Read more ›

NASA has been collecting surface temperature for more than over 100 years, and the GISS Surface Temperature analysis from 1888 onward. It is an estimate of global surface temperature change. The temperature analysis schema was defined in the late 1970s…Read more ›

We all remember this, right? What a nightmare was to type a short message on these keypads. So, image writing Hello on this keypad, you had to press: 4433555555666 to get the letters “hello”. 44 = h33 = e555 =…Read more ›