What is ggplot2
ggplot2 is a plotting system for R, based on the grammar of graphics, which tries to take the good parts of base and lattice graphics and none of the bad parts. It takes care of many of the fiddly details that make plotting a hassle (like drawing legends) as well as providing a powerful model of graphics that makes it easy to produce complex multi-layered graphics. – http://ggplot2.org/
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Web Scraping with R
Posted by: mistan
Web table scraping
Shiny is –
A web application framework for R Turn your analyses into interactive web applications No HTML, CSS, or JavaScript knowledge required.
Best place to learn is the tutorial from official site.
shiny package for R
Inspired and adapted from here. dplyer tutorial here, or its own documentation. Another tutorial for dplyr and tidyr; The cheatsheet is useful too, install the dataset from the page’s footnote devtools::install_github("rstudio/EDAWR").
magrittr: Simplifying R code with pipes
Workflow for statistical analysis with R
Posted by: mistan
NB: Quantitative = continuous
Categorical = Discrete
Uni-variable
| Variable | Charts | Statistics |
|---|---|---|
| Category | Bar Chart, Pie Chart | frequencies ->Chi Square |
| Quantitative | Box Plot, Histogram | descriptive -> single mean or proportion: Hypothesis test |
geom_bar. ggplot2 0.9.3.1geom_bar. ggplot2 0.9.3.1
The bar geom is used ...
MAY
R is a free software environment for statistical computing and graphics. The following is some basics about R data types.
Comparison of vector,list,matrix and dataframe
| vector | list | matrix | dataframe | |
|---|---|---|---|---|
| creation | c | list | matrix | data.frame |
| same type | Y | N | Y | N |
| class | class of its elements | list | matrix | data.frame |
MAY
R Source Code Blocks in Org Mode
Posted by: mistan
Setup and configuration
Adapted from org-mode official site.
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Install R with binary or source code Comprehensive R Archive Network for Arch Linux, following documents here.
Continue Reading →Preamble
Three great virtues of a programmer; Laziness, Impatience and Hubris. – Larry Wall
- Laziness: The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful and document what you wrote so you don’t have to answer so many questions about it.
- Impatience: The anger you feel when the computer is being lazy. This makes you write programs that don’t ...
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It was a late night, and I did a full system update. Either it failed during update or whatever … as I said it is late and I am tired… The system won’t boot into Linux the next morning
The reason was …
As I suspected, the kernal is corrupted.
rollback the kernal from cache:
I came across this script after a long struggle to set up a hotspot using my computer’s internet service, wired or wirelss. Create_ap script uses hostapd + dnsmasq + iptables to create a NATed Access Point OR hostapd + brctl + dhclient to create a bridged Access Point. The default behavior is a NATed Access Point,see here or github.
Continue Reading →Requirement and Eligibility Check
You need a nl80211 compatible wireless device, which ...
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