Published: 2016-11-30 Updated: 2017-03-23 "Any bleeder knows that books are never finished, only abandoned." Why Information Grows About the book You can find the book here. This is a book that may look complete but changes in R package are al... [Read more...]

Published: 2016-11-30 Updated: 2017-03-23 "Any bleeder knows that books are never finished, only abandoned." Why Information Grows About the book You can find the book here. This is a book that may look complete but changes in R package are al... [Read more...]

In the first part of this entry I did show some mtcars examples, where am can be useful to explain ANOVA as its observations are defined as: $$ am_i = \begin{cases}1 &\text{ if car } i \text{ is manual} \cr 0 &\text{ if car } i \text{ is automatic}\end{cases} $$ Now I'll ... [Read more...]

In the first part of this entry I did show some mtcars examples, where am can be useful to explain ANOVA as its observations are defined as: $$ am_i = \begin{cases}1 &\text{ if car } i \text{ is manual} \cr 0 &\text{ if car } i \text{ is automatic}\end{cases} $$ Now I'll ... [Read more...]

Linear Regression and ANOVA concepts are understood as separate concepts most of the times. The truth is they are extremely related to each other being ANOVA a particular case of Linear Regression. Even worse, its quite common that students do memorize equations and tests instead of trying to understand Linear ... [Read more...]

Linear Regression and ANOVA concepts are understood as separate concepts most of the times. The truth is they are extremely related to each other being ANOVA a particular case of Linear Regression. Even worse, its quite common that students do memorize equations and tests instead of trying to understand Linear ... [Read more...]

Linear Regression and ANOVA concepts are understood as separate concepts most of the times. The truth is they are extremely related to each other being ANOVA a particular case of Linear Regression. Even worse, its quite common that students do memorize equations and tests instead of trying to understand Linear ... [Read more...]

On January, 10 2016 David Bowie left this earthly realm. Last month I decided to create a network and here is how to do that. Required packages You need jsonlite, igraph, network, plyr and R base. Other tools D3Plus by Alex Simoes and Dave Landry. Also Google Sheets. My data is ... [Read more...]

Update Jan 17, 2017： Ruilong Xu （徐瑞龙） warned me that 商務處智利中國 is 商务处智利中国 in traditional characters. Thanks for the correction，Ruilong！ I still don't have 2016's official trade numbers，sorry。I also moved to an open typography to write in simplified chinese and I added some ggplot2 v2.2 new features。 Before we start My chinese ... [Read more...]

Brief explanation This is the second part in a series on three articles about Structural Equation Modelling (SEM). This time I am glad to announce Jodie Burchell as a co-writer! In Structural Equation Modelling in R (Part 1) I explained the basics of CFA. SEM was explained as a general case ... [Read more...]

I prepared a network in the memory of David Bowie two years after he passed away. His music touched me. Here is the network. My sources were: the collaboration I knew + googling to verify those and adding others. [Read more...]

Introduction I was in need of using stock Python (Homebrew provided version) from RStudio and I found that the user path is ignored by GUI applications. I discovered that because Python packages installed via pip were not recognised from RStudio. Here'... [Read more...]

Most companies make extensive use of spreadsheets to store, work and share data internally. For years, Excel has been the main software that allowed people to share internal data. But using Excel for reporting has its drawbacks: First manually updating data into spreadsheets is time-consuming and takes a large amount ... [Read more...]

Introduction I have completed this specialization more than a year ago but I have decided to write again about it because I'm teaching Data Visualization at Universidad de Chile and JHU materials has proven to be an excellent source for my students. If you want to read more about this ... [Read more...]