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Recent Comments
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RLangTip
Get an overview of documentation for an installed package: help(package="<package-name>") #rstats
Common style for comments is # on a line of #rstats code, ## within functions, and ### at the top level of scripts. ESS indents accordingly
A single index can be used to select from a matrix. For example, X[row(X)==col(X)] is the same as diag(X) #rstats http://t.co/EY1uMfny
Robust function writing tip: use seq_len(N) instead of 1:N (it handles the N<1 case appropriately): http://t.co/mZdDZCJE #rstats
Train support vector machines in R with the "svm" function from the e1071 package: http://t.co/OM5duD90 #rstats
A handy alias (via @hadleywickham) for #rstats to prevent saving or loading workspaces: R --no-save --no-restore-data --quiet
Filter list elems that match a condition: id<-sapply(mylist, function(e) test(e)); mylist[id] # Replace "test" with any T/F expr #rstats
The # character introduces comments in R. Everything after the # character to end-of-line is ignored by the interpreter. #rstats
The "break" statement immediately exits from a "for" or "while" loop: http://t.co/O4xamQqt #rstats
To debug warnings, options(warn=2) converts warnings into errors #rstats
Tag Archives: Linux
Moodle 2.1 released!
“Moodle is a software package for producing Internet-based courses and web sites. It is a global development project designed to support a social constructionist framework of education. Moodle is provided freely as Open Source software (under the GNU Public License).” … Continue reading
Debian celebrates its 17th birthday
Debian celebrates its 17th birthay! Read the official news..
Do NOT BUY any DVB USB devices with TRIDENT chipsets
Please do NOT buy any DVB USB devices with TRIDENT chipsets like Freecom DVB-T & Analog TV USB STICK (USB Id 14aa:0620), Moka Hybrid TV receiver MK-DVBT-DUAL (USB Id 14aa:0620), LifeView LR535 … a PCIe Mini Card (USB Id 10fd:0535), … Continue reading
Agosto 2008 in Kenia nel Meru
Ad agosto andro’ in Kenia, nel Meru, con l’associazione Binario per l’Africa. Li’ daremo una mano nella missione, nel cantiere della scuola in costruzione, oratorio con i bambini e ragazzi. Porteremo giu’ inoltre delle macchine da cucire e dei computer … Continue reading
Presentazione Free e Opensource Software (e Linux)
Trovate qui’ una presentazione sul Free & Opensource sw che ho fatto. Ho tagliato alcune slide sulla mia azienda per evitare eventuali problemi di sicurezza.