kibana error in visualization property of undefined

Fixing Kibana error ‘Error in visualization – Cannot read property of undefined’

Kibana is a great tool, with corporate-level user management, to visualize data from the Elasticsearch stack. Given the highly customizeable user roles, it’s easy to run into errors that appear to be gibberish. Here’s an example: Error in VisualizationCannot read property ‘x’ of undefined It seems to not make a lot of sense. However, it…Continue reading Fixing Kibana error ‘Error in visualization – Cannot read property of undefined’

I Umlaut column names BOM

Removing Ï.., I and two dots or umlaut, when using read.csv in R

Here’s something I used to bump in a lot when working with external files that I receive from clients: some gibberish prepended to the first column name of a data frame when using read.csv. However, there’s a good reason why this happens. The first character is a magical character, invisible to the human eye, but…Continue reading Removing Ï.., I and two dots or umlaut, when using read.csv in R

On the phenomenon of marketing books: why they are all the same

To many, including myself, the amount of hot air that is circulating in marketing books is of unbearable proportion. Buzzword bingo and infinite repetition of the same arguments makes us wonder who reads these books. But more importantly, who writes these books and with what purpose? Marketers write marketing books The self-proclaimed raison d’être of…Continue reading On the phenomenon of marketing books: why they are all the same

inf nan na

randomForest gives NA/NaN/Inf in foreign function call and how to solve it

Personally, Random Forest is one of my favorite algorithms for supervised learning. It’s quick and dirty and still allows for some interpretation. However, R and the RandomForest package are somewhat cryptic when it comes to requirements not met to properly train the algorithm. I bumped a lot into this error message. In this blog post…Continue reading randomForest gives NA/NaN/Inf in foreign function call and how to solve it