Clean Old Linux Kernels (Ubuntu)

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

Credit: http://ubuntugenius.wordpress.com/2011/01/08/ubuntu-cleanup-how-to-remove-all-unused-linux-kernel-headers-images-and-modules/

Updating R from R (on Windows) – using the {installr} package

http://www.r-statistics.com/2013/03/updating-r-from-r-on-windows-using-the-installr-package/

HTML URL Decoder/Encoder:

http://meyerweb.com/eric/tools/dencoder/

Dependency Walker 2.2

Dependency Walker is a free utility that scans any 32-bit or 64-bit Windows module (exe, dll, ocx, sys, etc.) and builds a hierarchical tree diagram of all dependent modules.

http://www.dependencywalker.com/

100 Great Google Docs Tips for Students & Educators

https://docs.google.com/document/d/1jynk1wLDf89qpTrF3S8XPNaMJB9ua29M9haSx4dZtPU/edit

Randomly Rename Every File in a Directory

http://www.howtogeek.com/57661/stupid-geek-tricks-randomly-rename-every-file-in-a-directory/

URL Encode and Decode Tool

http://www.url-encode-decode.com/

How to convert a scanned graph into real data

http://lifeupfront.com/2009/02/18/how-to-convert-a-scanned-graph-into-real-data/

Ghostcript PDF Reference & Tips

http://milan.kupcevic.net/ghostscript-ps-pdf/

Latin Word List - Latin Words for ...

Latin Word List - Latin Words for ...

http://www.latinwordlist.com/latin-word-for/

Flash Troubleshooting

http://kb.mozillazine.org/Flash#Troubleshooting

C:\Windows\System32\Macromed\Flash
mms.cfg
ProtectedMode=0

about:config
dom.ipc.plugins.timeoutSecs -> -1
dom.ipc.plugins.enabled.* -> false

Turn off hardware acceleration:
http://kb.mozillazine.org/Flash#Performance_or_display_issues_with_certain_Flash_videos

Algorithms and IEEE Trans - LaTeX

http://tex.stackexchange.com/a/55884/32616

a mcparallel/mccollect example

An example of mcparallel/mccollect to perform parallel tasks by creating external tasks.

library(parallel)

loop_function <- function (name, duration) {
start_time <- date()
i <- 0
while (i < duration) {
i <- i + 1
}
return (paste("Done: Job: ", name, "from", start_time, " to ", date()))
}
jobs_parallel <- lapply(1:9, function(x) mcparallel(loop_function(x, 3000000), name = x))
mccollect(jobs_parallel)
jobs_serial <- lapply(1:9, function(x) loop_function(x, 3000000))
jobs_serial

credits:

http://www.slideshare.net/bytemining/taking-r-to-the-limit-high-performance-computing-in-r-part-1-parallelization-la-r-users-group-727


http://stat.ethz.ch/R-manual/R-devel/library/parallel/doc/parallel.pdf

Building R packages in Windows

http://www.biostat.wisc.edu/~kbroman/Rintro/Rwinpack.html

After installing Rtools and fixing the PATH, you can use RStudio to build the packages. The built packages can be used in R too:

install.packages("path/to/the/package", type="source")

Creating graphics with R on the grid

http://bioinformaticslaboratory.nl/twiki/bin/view/EBioScience/GraphicsOnGridWithR

Dates and Times Made Easy with lubridate

http://www.jstatsoft.org/v40/i03/paper

10 R packages I wish I knew about earlier

http://blog.yhathq.com/posts/10-R-packages-I-wish-I-knew-about-earlier.html

Removing Lined Paper lines

http://magenta-moop.deviantart.com/art/Removing-Lined-Paper-lines-28770274

Convert units - Measurement Unit Converter

http://www.convertunits.com/

Matlab nested functions, allowing the inner function to see the workspace of the parent.

http://www.mathworks.com/help/matlab/matlab_prog/nested-functions.html