Milestone: 6000 Packages on CRAN
Another 1,000 packages were added to CRAN and this time in less than 12 months. Today (2014-10-29) on The Comprehensive R Archive Network (CRAN) package page: “Currently, the CRAN package...continue reading.
R News from another blog for R community
Flexible Beta Modeling
library(betareg) library(sas7bdat) df1 <- read.sas7bdat(‘lgd.sas7bdat’) df2 <- df1[df1$y < 1, ] fml <- as.formula(‘y ~ x2 + x3 + x4 + x5 + x6 | x3 + x4 | x1...continue reading.
Model Segmentation with Recursive Partitioning
library(party) df1 <- read.csv("credit_count.csv") df2 <- df1[df1$CARDHLDR == 1, ] mdl <- mob(DEFAULT ~ MAJORDRG + MINORDRG + INCOME + OWNRENT | AGE + SELFEMPL, data = df2, family =...continue reading.
Estimating a Beta Regression with The Variable Dispersion in R
pkgs <- c(‘sas7bdat’, ‘betareg’, ‘lmtest’) lapply(pkgs, require, character.only = T) df1 <- read.sas7bdat("lgd.sas7bdat") df2 <- df1[which(df1$y < 1), ] xvar <- paste("x", 1:7, sep = ”, collapse = " +...continue reading.
Shopping cart analysis with R – Multi-layer pie chart
We will review a very interesting type of visualization – the Multi-layer Pie Chart – and use it for one of the marketing analytics tasks – the shopping carts analysis This...continue reading.
Where do I start using Bioconductor?
I was recently asked where do I get started with Bioconductor? and thought this would be a good short post. What is BioC? Briefly, Bioconductor (Gentleman, Carey, Bates, and others,...continue reading.
Sensitivity and Elasticity of seasonal matrix model
The previous article introduced the seasonal matrices and the population growth rate λ of imaginary annual plant. In this article, let’s try the sensitivity analysis of these matrices and the...continue reading.
Passing a pandas.DataFrame on to Javascript within Ipython/Jupyter Notebook
Updated on Jan 3rd. 2016 – See at the bottom the code for Jupyter notebook 4.0.1 I was willing to pass on data contained in a quite big dataframe — specifically a pandas.DataFrame object...continue reading.
By-Group Aggregation in Parallel
Similar to the row search, by-group aggregation is another perfect use case to demonstrate the power of split-and-conquer with parallelism. In the example below, it is shown that the homebrew...continue reading.
End of the summer blogger challenge
This summer a few of us at Bmore Biostats agreed to a summer iron blogger challenge. We either had to blog every week or every two weeks. The penalty of...continue reading.
Vector Search vs. Binary Search
# REFERENCE: # user2014.stat.ucla.edu/files/tutorial_Matt.pdf pkgs <- c(‘data.table’, ‘rbenchmark’) lapply(pkgs, require, character.only = T) load(‘2008.Rdata’) dt <- data.table(data) benchmark(replications = 10, order = "elap…continue reading.
Row Search in Parallel
I’ve been always wondering whether the efficiency of row search can be improved if the whole data.frame is splitted into chunks and then the row search is conducted within each...continue reading.
Stage abundances, eigenvector of population matrix
The previous article introduced the seasonal matrices and the population growth rate λ of imaginary annual plant. This article focuses on the meaning of the eigenvector at first, and then...continue reading.
Select Distinct Values with Pig
First of all, I used SQL statement with SQLDF package in R. It took ~51 seconds user time to select 12 rows out of 7 millions. Next, I used Apache...continue reading.
Stay on track: Plotting GPS tracks with R
Many GPS devices and apps have the capability to track your current position via GPS. If you go walking, running, cycling, flying or driving, you can take a look at...continue reading.
Joint Models for Longitudinal and Survival Data
What are joint models for longitudinal and survival data?In this post we will introduce in layman’s terms the framework of joint models for longitudinal and time-to-event data. These models are...continue reading.
Periodic matrix model for annual plant demography
Let’s challenge to build a matrix population model of annual organisms and then calculate the population growth rate λ using R. Consider a simple life cycle of imaginary annual plants;...continue reading.
Getting emotional in the absence of something: Using the Berlin Affective Word List to analyze emotional valence and arousal for nouns and adjectives.
This is something I did a while ago using the Berlin Affective Word List (BAWL).The BAWL contains ratings for 2902 German words (2107 nouns, 504 verbs, 291 adjectives). Ratings were...continue reading.
Developmental regulation of human cortex transcription at base-pair resolution
This article is originally published at https://lcolladotor.github.io/ Thanks for visiting r-craft.org This article is originally published at https://lcolladotor.github.io/ Please visit source website for post related comments.continue reading.
