Circles and films from FilmWeb

Circles and films from FilmWeb

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I have been working recently on visualization of genetic data. In that field a popular method of presentation are circles generated by the circlize library. Turning a blind eye to the problem of reading information from circles I must say that the possibilities…

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Transformations of variables, scales and coordinates in ggplot2

Transformations of variables, scales and coordinates in ggplot2

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I am working on a short introduction to the Grammar of Graphics and its implementation in the ggplot2 package. Process of systematization of the elements of syntax reveals various ‘spices’ of ggplot2 and today I will talk about one of them, namely about application of transformations to diagrams.

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useR 2015 and htmlwidgets

useR 2015 and htmlwidgets

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I’ve been wondering if this year’s useR conference foreshadowed some gigantic groundbreaking change in the world of R. The previous useR conference was a sort of catalyst for dplyr package and operator %>%. The profession (especially from California)…

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Sapkowski, Dukaj and the wikipediatrend package

Sapkowski, Dukaj and the wikipediatrend package

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Recently I tested a quite nice package for R: wikipediatrend (available on CRAN). With just a few lines of code, it can easily download and visualize daily wikipedia page views statistics. Great package, so we are going to take a closer look. I’ve just finished Season…

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archivist 1.5

archivist 1.5

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Archivist is an R package for object management (storing, sharing, searching). I am going to present it on useR conference next week (hope I can meet some of you in Aalborg). Below you will find two coolest (imho) features implemented in the version 1.5 of archivist.

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Shiny, polls and interactive ggplot2

Shiny, polls and interactive ggplot2

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Today we will use ggplot2 to recreate the diagrams presenting support in voting intention polls conducted before presidential elections. The story behind is interesting so let’s see it again. Yesterday RStudio has released a new version of shiny. Version 0.12 comes…

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Data visualization vs. information management

Data visualization vs. information management

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Yesterday I had a presentation ‘Data visualization vs. information management’. The core of the presentation were two examples which I present below. The punch line comes down to a simple statement: It is not enough to present data graphically; its presentation must…

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Is there a limit to athletes' abilities in athletic running events?

Is there a limit to athletes’ abilities in athletic running events?

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I’m forming a group of students and grads interested in data analysis: The MI^2 (square) Group. The name comes from the fact that we have students from MIM University of Warsaw and MINI Warsaw Technical University. We are playing with different projects and ideas…

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Mice, post hoc tests and diffograms

Mice, post hoc tests and diffograms

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I’ve recently worked on an interesting problem. There are two types of mice. We select three animals of each type. We want to examine an effect of given treatment on nerve cells, more specific: on their dendritic spines (small protrusions located at neurons). From…

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The-marathon-of-teams’-data-analysis-–-wrap-up

The marathon of teams’ data analysis – wrap-up

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The first team’s data analysis marathon took place on last Saturday. Almost 60 participants turned up to take part in it (representing various levels of proficiency in the art of data analysis and different regions of Poland –most were from Warsaw but there were…

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