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…
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Little useless-useful R functions – Function for faster reading with Bionic Reading
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…
Tagged with: function, Learning, R, reading, useful, useless
Posted in R, Uncategorized, Useless R functions
Posted in R, Uncategorized, Useless R functions
Little useless-useful R functions – Continuous, nowhere differentiable Weierstrass function
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…
Little useless-useful R functions – Return matrix elements in spiral order
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…
Little useless-useful R functions – Goldbach’s conjecture and Sieve of Sundaram
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…
Tagged with: conjecture, function, Goldbach, prime numbers, primes, R, useless
Posted in R, Useless R functions
Posted in R, Useless R functions
“Climate spiral” – Plotting GISS Surface Temperature
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…
Tagged with: climate change, ggplot, GISS, NASA, R, surface temperature
Posted in thoughts, Useless R functions
Posted in thoughts, Useless R functions
Little useless-useful R functions – Old phone converted from text to numbers
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 =…
Little useless-useful R functions – Transforming dataframe to markdown table
Writing markdown documents outside RStudio (using the usual set of packages) has benefits and struggles. Huge struggle is transforming dataframe results into markdown table, using hypens and pipes. Ugghhh… This useless functions takes R dataframe as input and prints out…
Little useless-useful R functions – Using xspline to create wacky signatures
Nothing short of wacky usage of plot() function with xspline to interpolate the points, but still a “parameter” short of Bezier’s curve. 🙂 Given two random vectors, you can generate a plot that, xspline will smooth out the plot and…
Tips for organising your R code
Keeping your R code organised is not as straightforward as one might think. Just think about the libraries, variables, functions, and many more. All these objects can be defined and later rewritten, some might get obsolete during the process. This…
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