PostcodesioR 0.1.1 is on CRAN
Introduction The latest stable version of my UK geocoder package has finally made it to CRAN. PostcodesioR is a wrapper for postcodes.io and it provides multiple functions to work with...continue reading.
Author: Eryk Walczak
Extracting pitch track from audio files into a data frame
My task was to extract pitch values from a long list of audio files. Previously I used Praat and R for this task but looping in R was rather slow...continue reading.
Automatic splitting of audio files on silence in Python
In my previous post I described how to split audio files into chunks using R. This time I wanted to use Python to prepare long audio files (.mp3) for further...continue reading.
Book Review – Sound Analysis and Synthesis with R
R might not be the most obvious tool when it comes to analysing audio data. However, an increasing number of packages allows analysing and synthesising sounds. One of such packages...continue reading.
Spectrograms in R – a gallery
Creating a spectrogram is a basic step in every analysis of audio signals. Spectrograms visualise how frequencies change over a time period. Luckily, there is a selection of R packages...continue reading.
Geofacet Polski – wykresy w miejscu województw
Niedawno odnalazłem ciekawy pakiet geofacet, który umożliwia rozmieszczenie wykresów zgodnie z ich pozycją na mapie. Główna funkcja facet_geo() zastępuje facet_wrap() z ggplot2. Polska mapa jeszcze nie jest dostępna w standardowym...continue reading.
Downloading UK property prices from Zoopla in R
Zoopla allows a limited access to its API providing the latest property prices and area indices. I created a package in R that allows querying this database. See the GitHub...continue reading.
Enabling MATLAB in Jupyter notebooks on Linux
Introduction In my previous post I showed how to enable MATLAB in Jupyter notebooks on Windows. Now it’s time for GNU/Linux (Ubuntu). My main issue with enabling new kernel was...continue reading.
How to add code coverage (codecov) to your R package?
During the development of another R package I wasted a bit of time figuring out how to add code coverage to my package. I had the same problem last time...continue reading.
Interactive plot of fNIRS data
The easiest way to plot ETG-4000 data in R is by using plot_ETG4000() from fnirsr package. However, if you want to explore your data in more detail, then an interactive...continue reading.
fnirsr – Fixing bugs, Travis CI, and detrending
I haven’t worked on fnirsr (my R package for analysing fNIRS data) for a while so I thought it’s time for some improvements. I read a great introduction to Travis...continue reading.
Preview of a scientific notebook in fnirsr
Here’s a demonstration of using the notebook within the fnirsr package: More information about R Notebooks can be found in the RStudio’s blog post.continue reading.
Sending serial triggers from PsychoPy to ETG-4000 fNIRS
In the process of designing my latest experiment in PsychoPy I realised that setting up the serial port connection is not the most obvious thing to do. I wrote this...continue reading.
