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Month: February 2018

T-Test: Dr. Semmelweis and the discovery of handwashing

T-Test: Dr. Semmelweis and the discovery of handwashing

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This article only illustrates the use of t-test in a real life problem but does not provide any technical information on what is T-Test or how T-Test works. I will go through the T-test in details in another post and will link it into this post. Intro I was looking for a cool dataset to illustrate the use of T.test and I found this DataCamp project “Dr. Semmelweis and the discovery of handwashing”. This a straightforward project but I really…

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Export Data from Power BI into a file using R

Export Data from Power BI into a file using R

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We usually import Data from file into Power BI, but exporting data from Power BI can be very handy when you want to create a custom visual using R. In fact it can be very cumbersome to code your visual directly into the Power BI script editor. Here are few reasons why you should opt for exporting your Power Bi dataset first and re-import it in R to create your visual. Intellisense is not available in Power BI R script…

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Import multiple CSV files in R and load them all together in a single data frame

Import multiple CSV files in R and load them all together in a single data frame

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List of all the filenames One approach I found really straight forward is to create a list of all your filenames. You can also create a pattern to fetch your directory and returns all the matching files. In my example I need to read all the files starting with “FR”. The function lapply (equivalent of a loop) reads every single file presents in my list fileNames and store them into my variable zonnesFiles. The variable zonnesFiles is a list of…

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PowerBI – Dynamic Chart Title

PowerBI – Dynamic Chart Title

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Unlike Qlikview, the chart titles in PowerBI can only be static. as you can only pass a static text in the title parameter. However, there’s a way around it! The workaround I found is pretty simple you just need to fake a title by creating a measure that contains your title expression and drop this measure into a Card visual. Then by applying the same transparency and colours of your chart you just need to turn off the chart tile…

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