-
Tags
Activemq Add new tag Africa Ambiente Animals Apache Camel Barzellette beneficenza Berlusconi Cairo calendario Carate Brianza Chess Collaboration Colleagues Database Development dvb Ecologia Economia Erlang facebook Foto Friends Google Java LinkedIn Linux Me No profit OpenSource Poesie Politica Programming R Servicemix SOA statistics Trasporti twitter Volontariato Web WebService W l\'Italia WorkArchives
- December 2011 (2)
- October 2011 (2)
- August 2011 (2)
- July 2011 (4)
- June 2011 (4)
- May 2011 (2)
- March 2011 (1)
- December 2010 (5)
- September 2010 (2)
- August 2010 (2)
- June 2010 (2)
- May 2010 (1)
- April 2010 (1)
- March 2010 (1)
- February 2010 (2)
- January 2010 (3)
- December 2009 (2)
- October 2009 (4)
- September 2009 (2)
- August 2009 (1)
- June 2009 (5)
- May 2009 (1)
- April 2009 (3)
- February 2009 (2)
- January 2009 (5)
- December 2008 (1)
- November 2008 (3)
- October 2008 (3)
- September 2008 (1)
- August 2008 (3)
- July 2008 (3)
- June 2008 (1)
- May 2008 (5)
- April 2008 (6)
- March 2008 (4)
- February 2008 (3)
- January 2008 (3)
- December 2007 (1)
- November 2007 (9)
- October 2007 (2)
- September 2007 (12)
- August 2007 (5)
- September 2006 (1)
Recent Comments
-
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
Monthly Archives: January 2009
Microsoft Tax and Apple tax
Microsoft dice che ogni volta che si compra un Mac si paga una tassa ad Apple. Ma si puo’ dire analogamente che ogni volta che si compra un pc con installato windows, si paga una tassa a Microsoft. Con Linux … Continue reading
L'inverno miete vittime tra i senza tetto mentre la chiesa sta a guardare?
Ogni anno il freddo dell’inverno miete vittime tra i senzatetto. Possibile che la chiesa, con tutti i beni immobili che ha distribuiti sul terrirorio, non riesca a dare rifugio a quei disperati senza abitazione? Almeno nei mesi piu’ freddi? A … Continue reading
Lentamente muore
Lentamente muore Lentamente muore chi diventa schiavo dell’abitudine, ripetendo ogni giorno gli stessi percorsi, chi non cambia la marca, chi non rischia e cambia colore dei vestiti, chi non parla a chi non conosce. Muore lentamente chi evita una passione, … Continue reading
N queens solution with erlang
“The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queen’s moves. The queens must be placed in such … Continue reading