A mechanistic model for the relationship between x and y sometimes needs parameter estimation. When model linearisation does not work,we need to use non-linear modelling. There are three main differences between non-linear and linear modelling in R: 1. specify the exact nature of the equation 2. replace the lm() with nls() which means nonlinear least Related exercise sets:Spatial Data...
I recently wrote a blog post here comparing the number of CRAN downloads an R package gets relative to its number of stars on GitHub. What I didn’t...
![Le Monde puzzle [#1053]](https://xianblog.files.wordpress.com/2018/03/sieglemond.jpg?w=450&h=192)
An easy arithmetic Le Monde mathematical puzzle again: If coins come in units of 1, x, and y, what is the optimal value of (x,y) that minimises the number...
The new PYPL Popularity of Programming Languages (June 2018) index ranks Python at #1 and R at #7. Like the similar TIOBE language index, the PYPL index uses Google...
We here at Win-Vector LLC have some really big news we would please like the R-community’s help sharing. vtreat version 1.2.0 is now available on CRAN, and this version...
You may be interested in my new arXiv paper, joint work with Xi Cheng, an undergraduate at UC Davis (now heading to Cornell for grad school); Bohdan Khomtchouk, a...
In the exercises below, we will explore more in Time Series analysis.The previous exercise is here,Please follow this in sequence Answers to these exercises are available here. Exercise 1...
I have frequent conversations with R champions and Systems Administrators responsible for R, in which they ask how they can measure and analyze the usage of their servers. ...
A quick riddler resolution during a committee meeting (!) of a short riddle: 36 houses stand in a row and collapse at times t=1,2,..,36. In addition, once a house...
A visual exploration of the 2017-2018 NBA landscape The modern NBA landscape is rapidly changing. Steph Curry has redefined the lead guard prototype with jaw-dropping shooting range coupled with...
You have got the best job of the 21st century. Like a treasure hunter, looking for a data treasure chest while sailing through data lakes. In many companies you...
To post your R job on the next post Just visit this link and post a new R job to the R community. You can post a job for free (and there are...
RStudio Connect version 1.6.4 is now available! There are a few breaking changes and a handful of new features that are highlighted below. We encourage you to upgrade as soon as...
You can find members of the rOpenSci team at various meetings and workshops around the world. Come say ‘hi’, learn about how our software packages can enable your research,...
Do a t-test APA formatted output Flexibility Dataframe of Values Contribute Credits Previous blogposts One of the most time-consuming part of data analysis in...
Even though the libraries for R from Python, or Python from R code execution existed since years and despite of a recent announcement of Ursa Labs foundation by Wes...
Sometimes, with big data, matrices are too big to handle, and it is possible to use tricks to numerically still do the map. Map-Reduce is one of those. With...
I haven't had a lot of time to play with this but yesterday, I discovered the tuber R package, which allows you to interact with the YouTube API.To use...
I’ve heard about a number of consulting companies, that decided to use simple linear model instead of a black box model with higher performance, because ,,client wants to understand...
New Features As promised, we kept on working on our bounceR package. For once, we changed the interface: users now do not have to choose a number of tuning...
As promised - though a bit delayed - below are links to my slides and the video of my talk on Future: Parallel & Distributed Processing in R for...
It seems like all the best R packages proudly use GitHub and have a README adorned with badges across the top. The recent Microsoft acquisition of GitHub got me...
These are my sketchnotes for Sam Charrington’s podcast This Week in Machine Learning and AI about Practical Deep Learning with Rachel Thomas: Sketchnotes from TWiMLAI talk: Practical Deep Learning with...
Every inch of sky’s got a star Every inch of skin’s got a scar (Everything Now, Arcade Fire) I think that a very good way to start with R...
We’ve released the newest version of NIMBLE on CRAN and on our website. Version 0.6-11 has important new features, notably support for Bayesian nonparametric mixture modeling, and more are...
In this post, I will illustrate the use of prediction intervals for the comparison of measurement methods. In the example, a new spectral method for measuring whole blood hemoglobin...
Many types of machine learning classifiers, not least commonly-used techniques like ensemble models and neural networks, are notoriously difficult to interpret. If the model produces a surprising label for...
R Tip: be wary of “...“. The following code example contains an easy error in using the R function unique(). vec1
