R und Datenbanken

Es ist umständlich, Daten aus Datenbanken für R per CSV-Export/Import zu verarbeiten. Das RStudio kann mit install.packages("RODBC") erweitert werden, um Daten direkt per ODBC einzulesen.

[code lang=“scilab“]library(„RODBC“, lib.loc=“C:/R/R-2.15.0/library“)
ch <- odbcConnect("srver/db") d <- sqlQuery(ch, "select a, b from tabelle") close(ch) boxplot(d$a ~ d$b, horizontal=TRUE, par(mar=c(2,10,1,1), las=1)) remove(d)[/code] Update: StatET is an Eclipse based IDE for R.

Netscreen Debugging

debug dns proxy
clear db
get db str
undebug all
debug flow basic
set ff dst-ip 192.168.100.20
set ff dst-port 80
get ff
unset ff
undebug all
get route ip 192.168.100.20
get dns name server.domain.de

Java Encodings and Charset

Basic Encoding Set (contained in lib/rt.jar)
Supported by java.nio, java.io and java.lang APIs

Canonical Name for java.nio API Canonical Name for java.io and java.lang API Description
US-ASCII ASCII American Standard Code for Information Interchange
windows-1250 Cp1250 Windows Eastern European
windows-1251 Cp1251 Windows Cyrillic
windows-1252 Cp1252 Windows Latin-1
ISO-8859-1 ISO8859_1 ISO 8859-1, Latin Alphabet No. 1
ISO-8859-15 ISO8859_15 Latin Alphabet No. 9
KOI8-R KOI8_R KOI8-R, Russian
UTF-8 UTF8 Eight-bit UCS Transformation Format
UTF-16 UTF-16 Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark

Weiterlesen…

Update: Lesenswert Verwendung von Character Sets in Java