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Last week I extended my Bayesian model. So this week I wanted to test it with different data. There is one other data set with profiling data in R, french fries in the reshape package. 'This data was collected from a sensory experiment conducted at Iow... [Read more...]

knitr is a an R package that allows you to include R code in markdown or LaTeX source files, and have the code and/or its output included in the resulting html or pdf files. RStudio provides good support for this, so if you want to try it out that’... [Read more...]

Last week I gave a short talk at CMU’s statistical computing seminar, Stat Bytes. I summarized why reproducible research (RR) and literate programming are worthwhile, not just for serious research but also for homework reports or statistical blog posts. I … Continue reading → [Read more...]

This is part 2/3 in my series on healthcare costs. The analysis is driven by my own needs as an …Continue reading » [Read more...]

I have a few upcoming presentations as a part of job interviews. To prepare for these interviews, I'm attempting to make my figures a bit more interactive within my presentations. The aim is to be able to limit any large cumbersome tables I would need to include in my presentations ... [Read more...]

Writing R code can be very easy. It depends on how much you want to achieve with your code and what features you want your code to support. To test a random thought that needs some statistical evidence, you only need to casually import data, slightly transform the data to ... [Read more...]

Looking for a sweet gift for your data-loving significant other? Then check out these statistical distribution plushies on Etsy: Availale in pink (log-Normal distribution), yellow (chi-square distribution), light green (Normal distribution), baby blue (T-distribution), and lilac (uniform distribution). They're cute, they're educational, last longer than roses and much better for ... [Read more...]

I have written this post mostly for myself. I don’t want to waste 2 hours on this problem again at some point in the future.  Hopefully others might stumble on it too and save some aggravation. So, the issue I had this morning was writing up a a makefile in ... [Read more...]

The BitCoin cryptocurrency has been much in the news of late. What, you don't have BitCoins? (Don't worry, neither do I.) Unless you have a supercomputer in your back yard and a cheap source of power, it's no longer really feasible to mine them yourself. But if you want some, ... [Read more...]

This article is about the “Digit Recognizer” challenge on Kaggle. You are provided with two data sets. One for training: consisting of 42’000 labeled pixel vectors and one for the final benchmark: consisting of 28’000 vectors while labels are not … Continue reading → The post “Digit Recognizer” Challenge on Kaggle using SVM Classification ... [Read more...]

In a previous blog, I post a simple authentication method for Shiny-app, and received several comments mainly concerning that I should encrypt user password. I agree, user’s password can be intercepted when it was transferring. To secure users’ personal information, I think we should consider both server and client ... [Read more...]

@roguelynn tweeted the other day: If attendees of this weekend’s intro to python workshop leave with one thing, it’ll be to Google your error messages first and foremost. I had just talked about the technique in my Tools for Reproducible Research course, and I had a few recent ... [Read more...]

I have found this post to be very useful; [Read more...]

I’ve recently come across the https://www.undata-api.org/ website, which makes available all the great data that has been gathered by the UN. There’s literally a thousand different datasets one could analyze, and I intend on doing just that, but for some reason I opted to look ... [Read more...]

Let's add a fit line to a scatterplot!Fit Line in Base GraphicsHere's how to do it in base graphics:ols [Read more...]

by Joseph Rickert Recently, I was trying to remember how to make a 3D scatter plot in R when it occurred to me that the documentation on how to do this is scattered all over the place. Hence, this short organizational note that you may find useful. First of all, ... [Read more...]

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Mango Solutions is a UK based R services company, offering application development, consultancy, training and support. We have a growing team of R developers and consultants who work on a wide variety of projects across a diverse range of sectors. We continue to look for talented individuals with R skills (... [Read more...]

This is a short script to help installing packages on the fly.It is most useful if you are distributing a set of script files to people who may not be aware that the needed packages are not installed on their systems. It is also useful if you use ... [Read more...]